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Author SHA1 Message Date
Linus Torvalds
a1257b5e3b Rust changes for v6.5 
A fairly small one in terms of feature additions. Most of the changes in
 terms of lines come from the upgrade to the new version of the toolchain
 (which in turn is big due to the vendored 'alloc' crate).
 
  - Upgrade to Rust 1.68.2:
 
    This is the first such upgrade, and we will try to update it often
    from now on, in order to remain close to the latest release, until
    a minimum version (which is "in the future") can be established.
 
    The upgrade brings the stabilization of 4 features we used (and 2
    more that we used in our old 'rust' branch).
 
    Commit 3ed03f4da0 ("rust: upgrade to Rust 1.68.2") contains the
    details and rationale.
 
  - pin-init API:
 
    Several internal improvements and fixes to the pin-init API, e.g.
    allowing to use 'Self' in a struct definition with '#[pin_data]'.
 
  - 'error'  module:
 
    New 'name()' method for the 'Error' type (with 'errname()'
    integration), used to implement the 'Debug' trait for 'Error'.
 
    Add error codes from 'include/linux/errno.h' to the list of Rust
    'Error' constants.
 
    Allow specifying error type on the 'Result' type (with the default
    still being our usual 'Error' type).
 
  - 'str' module:
 
    'TryFrom' implementation for 'CStr', and new 'to_cstring()' method
    based on it.
 
  - 'sync' module:
 
    Implement 'AsRef' trait for 'Arc', allowing to use 'Arc' in code that
    is generic over smart pointer types.
 
    Add 'ptr_eq' method to 'Arc' for easier, less error prone comparison
    between two 'Arc' pointers.
 
    Reword the 'Send' safety comment for 'Arc', and avoid referencing it
    from the 'Sync' one.
 
  - 'task' module:
 
    Implement 'Send' marker for 'Task'.
 
  - 'types' module:
 
    Implement 'Send' and 'Sync' markers for 'ARef<T>' when 'T' is
    'AlwaysRefCounted', 'Send' and 'Sync'.
 
  - Other changes:
 
    Documentation improvements and '.gitattributes' change to start
    using the Rust diff driver.
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Merge tag 'rust-6.5' of https://github.com/Rust-for-Linux/linux

Pull rust updates from Miguel Ojeda:
 "A fairly small one in terms of feature additions. Most of the changes
  in terms of lines come from the upgrade to the new version of the
  toolchain (which in turn is big due to the vendored 'alloc' crate).

  Upgrade to Rust 1.68.2:

   - This is the first such upgrade, and we will try to update it often
     from now on, in order to remain close to the latest release, until
     a minimum version (which is "in the future") can be established.

     The upgrade brings the stabilization of 4 features we used (and 2
     more that we used in our old 'rust' branch).

     Commit 3ed03f4da0 ("rust: upgrade to Rust 1.68.2") contains the
     details and rationale.

  pin-init API:

   - Several internal improvements and fixes to the pin-init API, e.g.
     allowing to use 'Self' in a struct definition with '#[pin_data]'.

  'error' module:

   - New 'name()' method for the 'Error' type (with 'errname()'
     integration), used to implement the 'Debug' trait for 'Error'.

   - Add error codes from 'include/linux/errno.h' to the list of Rust
     'Error' constants.

   - Allow specifying error type on the 'Result' type (with the default
     still being our usual 'Error' type).

  'str' module:

   - 'TryFrom' implementation for 'CStr', and new 'to_cstring()' method
     based on it.

  'sync' module:

   - Implement 'AsRef' trait for 'Arc', allowing to use 'Arc' in code
     that is generic over smart pointer types.

   - Add 'ptr_eq' method to 'Arc' for easier, less error prone
     comparison between two 'Arc' pointers.

   - Reword the 'Send' safety comment for 'Arc', and avoid referencing
     it from the 'Sync' one.

  'task' module:

   - Implement 'Send' marker for 'Task'.

  'types' module:

   - Implement 'Send' and 'Sync' markers for 'ARef<T>' when 'T' is
     'AlwaysRefCounted', 'Send' and 'Sync'.

  Other changes:

   - Documentation improvements and '.gitattributes' change to start
     using the Rust diff driver"

* tag 'rust-6.5' of https://github.com/Rust-for-Linux/linux:
  rust: error: `impl Debug` for `Error` with `errname()` integration
  rust: task: add `Send` marker to `Task`
  rust: specify when `ARef` is thread safe
  rust: sync: reword the `Arc` safety comment for `Sync`
  rust: sync: reword the `Arc` safety comment for `Send`
  rust: sync: implement `AsRef<T>` for `Arc<T>`
  rust: sync: add `Arc::ptr_eq`
  rust: error: add missing error codes
  rust: str: add conversion from `CStr` to `CString`
  rust: error: allow specifying error type on `Result`
  rust: init: update macro expansion example in docs
  rust: macros: replace Self with the concrete type in #[pin_data]
  rust: macros: refactor generics parsing of `#[pin_data]` into its own function
  rust: macros: fix usage of `#[allow]` in `quote!`
  docs: rust: point directly to the standalone installers
  .gitattributes: set diff driver for Rust source code files
  rust: upgrade to Rust 1.68.2
  rust: arc: fix intra-doc link in `Arc<T>::init`
  rust: alloc: clarify what is the upstream version
 2023-06-26 09:35:50 -07:00
Linus Torvalds
300edd751b - Add a ORC format hash to vmlinux and modules in order for other tools 
which use it, to detect changes to it and adapt accordingly
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Merge tag 'objtool_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool fix from Borislav Petkov:

 - Add a ORC format hash to vmlinux and modules in order for other tools
   which use it, to detect changes to it and adapt accordingly

* tag 'objtool_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/unwind/orc: Add ELF section with ORC version identifier
 2023-06-25 10:00:17 -07:00
Florian Fainelli
6a59cb5158 scripts/gdb: fix SB_* constants parsing 
--0000000000009a0c9905fd9173ad
Content-Transfer-Encoding: 8bit

After f15afbd34d ("fs: fix undefined behavior in bit shift for
SB_NOUSER") the constants were changed from plain integers which
LX_VALUE() can parse to constants using the BIT() macro which causes the
following:

Reading symbols from build/linux-custom/vmlinux...done.
Traceback (most recent call last):
  File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/vmlinux-gdb.py", line 25, in <module>
    import linux.constants
  File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/scripts/gdb/linux/constants.py", line 5
    LX_SB_RDONLY = ((((1UL))) << (0))

Use LX_GDBPARSED() which does not suffer from that issue.

f15afbd34d ("fs: fix undefined behavior in bit shift for SB_NOUSER")
Link: https://lkml.kernel.org/r/20230607221337.2781730-1-florian.fainelli@broadcom.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Cc: Hao Ge <gehao@kylinos.cn>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-06-19 13:19:32 -07:00
Prathu Baronia
2049a7d0cb scripts: fix the gfp flags header path in gfp-translate 
Since gfp flags have been shifted to gfp_types.h so update the path in
the gfp-translate script.

Link: https://lkml.kernel.org/r/20230608154450.21758-1-prathubaronia2011@gmail.com
Fixes: cb5a065b4e ("headers/deps: mm: Split <linux/gfp_types.h> out of <linux/gfp.h>")
Signed-off-by: Prathu Baronia <prathubaronia2011@gmail.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nicolas Schier <nicolas@fjasle.eu>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Yury Norov <yury.norov@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-06-19 13:19:32 -07:00
Omar Sandoval
b9f174c811 x86/unwind/orc: Add ELF section with ORC version identifier 
Commits ffb1b4a410 ("x86/unwind/orc: Add 'signal' field to ORC
metadata") and fb799447ae ("x86,objtool: Split UNWIND_HINT_EMPTY in
two") changed the ORC format. Although ORC is internal to the kernel,
it's the only way for external tools to get reliable kernel stack traces
on x86-64. In particular, the drgn debugger [1] uses ORC for stack
unwinding, and these format changes broke it [2]. As the drgn
maintainer, I don't care how often or how much the kernel changes the
ORC format as long as I have a way to detect the change.

It suffices to store a version identifier in the vmlinux and kernel
module ELF files (to use when parsing ORC sections from ELF), and in
kernel memory (to use when parsing ORC from a core dump+symbol table).
Rather than hard-coding a version number that needs to be manually
bumped, Peterz suggested hashing the definitions from orc_types.h. If
there is a format change that isn't caught by this, the hashing script
can be updated.

This patch adds an .orc_header allocated ELF section containing the
20-byte hash to vmlinux and kernel modules, along with the corresponding
__start_orc_header and __stop_orc_header symbols in vmlinux.

1: https://github.com/osandov/drgn
2: https://github.com/osandov/drgn/issues/303

Fixes: ffb1b4a410 ("x86/unwind/orc: Add 'signal' field to ORC metadata")
Fixes: fb799447ae ("x86,objtool: Split UNWIND_HINT_EMPTY in two")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lkml.kernel.org/r/aef9c8dc43915b886a8c48509a12ec1b006ca1ca.1686690801.git.osandov@osandov.com
 2023-06-16 17:17:42 +02:00
Miguel Ojeda
3ed03f4da0 rust: upgrade to Rust 1.68.2 
This is the first upgrade to the Rust toolchain since the initial Rust
merge, from 1.62.0 to 1.68.2 (i.e. the latest).

# Context

The kernel currently supports only a single Rust version [1] (rather
than a minimum) given our usage of some "unstable" Rust features [2]
which do not promise backwards compatibility.

The goal is to reach a point where we can declare a minimum version for
the toolchain. For instance, by waiting for some of the features to be
stabilized. Therefore, the first minimum Rust version that the kernel
will support is "in the future".

# Upgrade policy

Given we will eventually need to reach that minimum version, it would be
ideal to upgrade the compiler from time to time to be as close as
possible to that goal and find any issues sooner. In the extreme, we
could upgrade as soon as a new Rust release is out. Of course, upgrading
so often is in stark contrast to what one normally would need for GCC
and LLVM, especially given the release schedule: 6 weeks for Rust vs.
half a year for LLVM and a year for GCC.

Having said that, there is no particular advantage to updating slowly
either: kernel developers in "stable" distributions are unlikely to be
able to use their distribution-provided Rust toolchain for the kernel
anyway [3]. Instead, by routinely upgrading to the latest instead,
kernel developers using Linux distributions that track the latest Rust
release may be able to use those rather than Rust-provided ones,
especially if their package manager allows to pin / hold back /
downgrade the version for some days during windows where the version may
not match. For instance, Arch, Fedora, Gentoo and openSUSE all provide
and track the latest version of Rust as they get released every 6 weeks.

Then, when the minimum version is reached, we will stop upgrading and
decide how wide the window of support will be. For instance, a year of
Rust versions. We will probably want to start small, and then widen it
over time, just like the kernel did originally for LLVM, see commit
3519c4d6e0 ("Documentation: add minimum clang/llvm version").

# Unstable features stabilized

This upgrade allows us to remove the following unstable features since
they were stabilized:

  - `feature(explicit_generic_args_with_impl_trait)` (1.63).
  - `feature(core_ffi_c)` (1.64).
  - `feature(generic_associated_types)` (1.65).
  - `feature(const_ptr_offset_from)` (1.65, *).
  - `feature(bench_black_box)` (1.66, *).
  - `feature(pin_macro)` (1.68).

The ones marked with `*` apply only to our old `rust` branch, not
mainline yet, i.e. only for code that we may potentially upstream.

With this patch applied, the only unstable feature allowed to be used
outside the `kernel` crate is `new_uninit`, though other code to be
upstreamed may increase the list.

Please see [2] for details.

# Other required changes

Since 1.63, `rustdoc` triggers the `broken_intra_doc_links` lint for
links pointing to exported (`#[macro_export]`) `macro_rules`. An issue
was opened upstream [4], but it turns out it is intended behavior. For
the moment, just add an explicit reference for each link. Later we can
revisit this if `rustdoc` removes the compatibility measure.

Nevertheless, this was helpful to discover a link that was pointing to
the wrong place unintentionally. Since that one was actually wrong, it
is fixed in a previous commit independently.

Another change was the addition of `cfg(no_rc)` and `cfg(no_sync)` in
upstream [5], thus remove our original changes for that.

Similarly, upstream now tests that it compiles successfully with
`#[cfg(not(no_global_oom_handling))]` [6], which allow us to get rid
of some changes, such as an `#[allow(dead_code)]`.

In addition, remove another `#[allow(dead_code)]` due to new uses
within the standard library.

Finally, add `try_extend_trusted` and move the code in `spec_extend.rs`
since upstream moved it for the infallible version.

# `alloc` upgrade and reviewing

There are a large amount of changes, but the vast majority of them are
due to our `alloc` fork being upgraded at once.

There are two kinds of changes to be aware of: the ones coming from
upstream, which we should follow as closely as possible, and the updates
needed in our added fallible APIs to keep them matching the newer
infallible APIs coming from upstream.

Instead of taking a look at the diff of this patch, an alternative
approach is reviewing a diff of the changes between upstream `alloc` and
the kernel's. This allows to easily inspect the kernel additions only,
especially to check if the fallible methods we already have still match
the infallible ones in the new version coming from upstream.

Another approach is reviewing the changes introduced in the additions in
the kernel fork between the two versions. This is useful to spot
potentially unintended changes to our additions.

To apply these approaches, one may follow steps similar to the following
to generate a pair of patches that show the differences between upstream
Rust and the kernel (for the subset of `alloc` we use) before and after
applying this patch:

    # Get the difference with respect to the old version.
    git -C rust checkout $(linux/scripts/min-tool-version.sh rustc)
    git -C linux ls-tree -r --name-only HEAD -- rust/alloc |
        cut -d/ -f3- |
        grep -Fv README.md |
        xargs -IPATH cp rust/library/alloc/src/PATH linux/rust/alloc/PATH
    git -C linux diff --patch-with-stat --summary -R > old.patch
    git -C linux restore rust/alloc

    # Apply this patch.
    git -C linux am rust-upgrade.patch

    # Get the difference with respect to the new version.
    git -C rust checkout $(linux/scripts/min-tool-version.sh rustc)
    git -C linux ls-tree -r --name-only HEAD -- rust/alloc |
        cut -d/ -f3- |
        grep -Fv README.md |
        xargs -IPATH cp rust/library/alloc/src/PATH linux/rust/alloc/PATH
    git -C linux diff --patch-with-stat --summary -R > new.patch
    git -C linux restore rust/alloc

Now one may check the `new.patch` to take a look at the additions (first
approach) or at the difference between those two patches (second
approach). For the latter, a side-by-side tool is recommended.

Link: https://rust-for-linux.com/rust-version-policy [1]
Link: https://github.com/Rust-for-Linux/linux/issues/2 [2]
Link: https://lore.kernel.org/rust-for-linux/CANiq72mT3bVDKdHgaea-6WiZazd8Mvurqmqegbe5JZxVyLR8Yg@mail.gmail.com/ [3]
Link: https://github.com/rust-lang/rust/issues/106142 [4]
Link: https://github.com/rust-lang/rust/pull/89891 [5]
Link: https://github.com/rust-lang/rust/pull/98652 [6]
Reviewed-by: Björn Roy Baron <bjorn3_gh@protonmail.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Reviewed-By: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Tested-by: Ariel Miculas <amiculas@cisco.com>
Tested-by: David Gow <davidgow@google.com>
Tested-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20230418214347.324156-4-ojeda@kernel.org
[ Removed `feature(core_ffi_c)` from `uapi` ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2023-05-31 17:35:03 +02:00
Linus Torvalds
b115d85a95 Locking changes in v6.4: 
- Introduce local{,64}_try_cmpxchg() - a slightly more optimal
    primitive, which will be used in perf events ring-buffer code.
 
  - Simplify/modify rwsems on PREEMPT_RT, to address writer starvation.
 
  - Misc cleanups/fixes.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:

 - Introduce local{,64}_try_cmpxchg() - a slightly more optimal
   primitive, which will be used in perf events ring-buffer code

 - Simplify/modify rwsems on PREEMPT_RT, to address writer starvation

 - Misc cleanups/fixes

* tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/atomic: Correct (cmp)xchg() instrumentation
  locking/x86: Define arch_try_cmpxchg_local()
  locking/arch: Wire up local_try_cmpxchg()
  locking/generic: Wire up local{,64}_try_cmpxchg()
  locking/atomic: Add generic try_cmpxchg{,64}_local() support
  locking/rwbase: Mitigate indefinite writer starvation
  locking/arch: Rename all internal __xchg() names to __arch_xchg()
 2023-05-05 12:56:55 -07:00
Luis Chamberlain
0199849acd sysctl: remove register_sysctl_paths() 
The deprecation for register_sysctl_paths() is over. We can rejoice as
we nuke register_sysctl_paths(). The routine register_sysctl_table()
was the only user left of register_sysctl_paths(), so we can now just
open code and move the implementation over to what used to be
to __register_sysctl_paths().

The old dynamic struct ctl_table_set *set is now the point to
sysctl_table_root.default_set.

The old dynamic const struct ctl_path *path was being used in the
routine register_sysctl_paths() with a static:

static const struct ctl_path null_path[] = { {} };

Since this is a null path we can now just simplfy the old routine
and remove its use as its always empty.

This saves us a total of 230 bytes.

$ ./scripts/bloat-o-meter vmlinux.old vmlinux
add/remove: 2/7 grow/shrink: 1/1 up/down: 1015/-1245 (-230)
Function                                     old     new   delta
register_leaf_sysctl_tables.constprop          -     524    +524
register_sysctl_table                         22     497    +475
__pfx_register_leaf_sysctl_tables.constprop       -      16     +16
null_path                                      8       -      -8
__pfx_register_sysctl_paths                   16       -     -16
__pfx_register_leaf_sysctl_tables             16       -     -16
__pfx___register_sysctl_paths                 16       -     -16
__register_sysctl_base                        29      12     -17
register_sysctl_paths                         18       -     -18
register_leaf_sysctl_tables                  534       -    -534
__register_sysctl_paths                      620       -    -620
Total: Before=21259666, After=21259436, chg -0.00%

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
 2023-05-02 19:24:16 -07:00
Linus Torvalds
d55571c008 Kbuild updates for v6.4 
- Refactor scripts/kallsyms to make it faster and easier to maintain
 
  - Clean up menuconfig
 
  - Provide Clang with hard-coded target triple instead of CROSS_COMPILE
 
  - Use -z pack-relative-relocs flags instead of --use-android-relr-tags
    for arm64 CONFIG_RELR
 
  - Add srcdeb-pkg target to build only a Debian source package
 
  - Add KDEB_SOURCE_COMPRESS option to specify the compression for a
    Debian source package
 
  - Misc cleanups and fixes
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Merge tag 'kbuild-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild updates from Masahiro Yamada:

 - Refactor scripts/kallsyms to make it faster and easier to maintain

 - Clean up menuconfig

 - Provide Clang with hard-coded target triple instead of CROSS_COMPILE

 - Use -z pack-relative-relocs flags instead of --use-android-relr-tags
   for arm64 CONFIG_RELR

 - Add srcdeb-pkg target to build only a Debian source package

 - Add KDEB_SOURCE_COMPRESS option to specify the compression for a
   Debian source package

 - Misc cleanups and fixes

* tag 'kbuild-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: deb-pkg: specify targets in debian/rules as .PHONY
  sparc: unify sparc32/sparc64 archhelp
  kbuild: rpm-pkg: remove kernel-drm PROVIDES
  kbuild: deb-pkg: add KDEB_SOURCE_COMPRESS to specify source compression
  kbuild: add srcdeb-pkg target
  Makefile: use -z pack-relative-relocs
  kbuild: clang: do not use CROSS_COMPILE for target triple
  kconfig: menuconfig: reorder functions to remove forward declarations
  kconfig: menuconfig: remove unused M_EVENT macro
  kconfig: menuconfig: remove OLD_NCURSES macro
  kbuild: builddeb: Eliminate debian/arch use
  scripts/kallsyms: update the usage in the comment block
  scripts/kallsyms: decrease expand_symbol() / cleanup_symbol_name() calls
  scripts/kallsyms: change the output order
  scripts/kallsyms: move compiler-generated symbol patterns to mksysmap
  scripts/kallsyms: exclude symbols generated by itself dynamically
  scripts/mksysmap: use sed with in-line comments
  scripts/mksysmap: remove comments described in nm(1)
  scripts/kallsyms: remove redundant code for omitting U and N
  kallsyms: expand symbol name into comment for debugging
 2023-04-30 11:32:53 -07:00
Linus Torvalds
310897659c Rust changes for v6.4 
More additions to the Rust core. Importantly, this adds the pin-init
 API, which will be used by other abstractions, such as the
 synchronization ones added here too:
 
   - pin-init API: a solution for the safe pinned initialization problem.
     This allows to reduce the need for 'unsafe' code in the kernel when
     dealing with data structures that require a stable address. Commit
     90e53c5e70 ("rust: add pin-init API core") contains a nice
     introduction -- here is an example of how it looks like:
 
         #[pin_data]
         struct Example {
             #[pin]
             value: Mutex<u32>,
 
             #[pin]
             value_changed: CondVar,
         }
 
         impl Example {
             fn new() -> impl PinInit<Self> {
                 pin_init!(Self {
                     value <- new_mutex!(0),
                     value_changed <- new_condvar!(),
                 })
             }
         }
 
         // In a `Box`.
         let b = Box::pin_init(Example::new())?;
 
         // In the stack.
         stack_pin_init!(let s = Example::new());
 
   - 'sync' module: new types 'LockClassKey' ('struct lock_class_key'),
     'Lock', 'Guard', 'Mutex' ('struct mutex'), 'SpinLock'
     ('spinlock_t'), 'LockedBy' and 'CondVar' (uses 'wait_queue_head_t'),
     plus macros such as 'static_lock_class!' and 'new_spinlock!'.
 
     In particular, 'Lock' and 'Guard' are generic implementations that
     contain code that is common to all locks. Then, different backends
     (the new 'Backend' trait) are implemented and used to define types
     like 'Mutex':
 
         type Mutex<T> = Lock<T, MutexBackend>;
 
     In addition, new methods 'assume_init()', 'init_with()' and
     'pin_init_with()' for 'UniqueArc<MaybeUninit<T>>' and 'downcast()'
     for 'Arc<dyn Any + Send + Sync>'; as well as 'Debug' and 'Display'
     implementations for 'Arc' and 'UniqueArc'. Reduced stack usage of
     'UniqueArc::try_new_uninit()', too.
 
   - 'types' module: new trait 'AlwaysRefCounted' and new type 'ARef'
     (an owned reference to an always-reference-counted object, meant to
     be used in wrappers for C types that have their own ref counting
     functions).
 
     Moreover, new associated functions 'raw_get()' and 'ffi_init()'
     for 'Opaque'.
 
   - New 'task' module with a new type 'Task' ('struct task_struct'), and
     a new macro 'current!' to safely get a reference to the current one.
 
   - New 'ioctl' module with new '_IOC*' const functions (equivalent to
     the C macros).
 
   - New 'uapi' crate, intended to be accessible by drivers directly.
 
   - 'macros' crate: new 'quote!' macro (similar to the one provided in
     userspace by the 'quote' crate); and the 'module!' macro now allows
     specifying multiple module aliases.
 
   - 'error' module: new associated functions for the 'Error' type,
     such as 'from_errno()' and new functions such as 'to_result()'.
 
   - 'alloc' crate: more fallible 'Vec' methods: 'try_resize` and
     'try_extend_from_slice' and the infrastructure (imported from
     the Rust standard library) they need.
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Merge tag 'rust-6.4' of https://github.com/Rust-for-Linux/linux

Pull rust updates from Miguel Ojeda
 "More additions to the Rust core. Importantly, this adds the pin-init
  API, which will be used by other abstractions, such as the
  synchronization ones added here too:

   - pin-init API: a solution for the safe pinned initialization
     problem.

     This allows to reduce the need for 'unsafe' code in the kernel when
     dealing with data structures that require a stable address. Commit
     90e53c5e70 ("rust: add pin-init API core") contains a nice
     introduction -- here is an example of how it looks like:

        #[pin_data]
        struct Example {
            #[pin]
            value: Mutex<u32>,

            #[pin]
            value_changed: CondVar,
        }

        impl Example {
            fn new() -> impl PinInit<Self> {
                pin_init!(Self {
                    value <- new_mutex!(0),
                    value_changed <- new_condvar!(),
                })
            }
        }

        // In a `Box`.
        let b = Box::pin_init(Example::new())?;

        // In the stack.
        stack_pin_init!(let s = Example::new());

   - 'sync' module:

     New types 'LockClassKey' ('struct lock_class_key'), 'Lock',
     'Guard', 'Mutex' ('struct mutex'), 'SpinLock' ('spinlock_t'),
     'LockedBy' and 'CondVar' (uses 'wait_queue_head_t'), plus macros
     such as 'static_lock_class!' and 'new_spinlock!'.

     In particular, 'Lock' and 'Guard' are generic implementations that
     contain code that is common to all locks. Then, different backends
     (the new 'Backend' trait) are implemented and used to define types
     like 'Mutex':

        type Mutex<T> = Lock<T, MutexBackend>;

     In addition, new methods 'assume_init()', 'init_with()' and
     'pin_init_with()' for 'UniqueArc<MaybeUninit<T>>' and 'downcast()'
     for 'Arc<dyn Any + Send + Sync>'; as well as 'Debug' and 'Display'
     implementations for 'Arc' and 'UniqueArc'. Reduced stack usage of
     'UniqueArc::try_new_uninit()', too.

   - 'types' module:

     New trait 'AlwaysRefCounted' and new type 'ARef' (an owned
     reference to an always-reference-counted object, meant to be used
     in wrappers for C types that have their own ref counting
     functions).

     Moreover, new associated functions 'raw_get()' and 'ffi_init()' for
     'Opaque'.

   - New 'task' module with a new type 'Task' ('struct task_struct'),
     and a new macro 'current!' to safely get a reference to the current
     one.

   - New 'ioctl' module with new '_IOC*' const functions (equivalent to
     the C macros).

   - New 'uapi' crate, intended to be accessible by drivers directly.

   - 'macros' crate: new 'quote!' macro (similar to the one provided in
     userspace by the 'quote' crate); and the 'module!' macro now allows
     specifying multiple module aliases.

   - 'error' module:

     New associated functions for the 'Error' type, such as
     'from_errno()' and new functions such as 'to_result()'.

   - 'alloc' crate:

     More fallible 'Vec' methods: 'try_resize` and
     'try_extend_from_slice' and the infrastructure (imported from the
     Rust standard library) they need"

* tag 'rust-6.4' of https://github.com/Rust-for-Linux/linux: (44 commits)
  rust: ioctl: Add ioctl number manipulation functions
  rust: uapi: Add UAPI crate
  rust: sync: introduce `CondVar`
  rust: lock: add `Guard::do_unlocked`
  rust: sync: introduce `LockedBy`
  rust: introduce `current`
  rust: add basic `Task`
  rust: introduce `ARef`
  rust: lock: introduce `SpinLock`
  rust: lock: introduce `Mutex`
  rust: sync: introduce `Lock` and `Guard`
  rust: sync: introduce `LockClassKey`
  MAINTAINERS: add Benno Lossin as Rust reviewer
  rust: init: broaden the blanket impl of `Init`
  rust: sync: add functions for initializing `UniqueArc<MaybeUninit<T>>`
  rust: sync: reduce stack usage of `UniqueArc::try_new_uninit`
  rust: types: add `Opaque::ffi_init`
  rust: prelude: add `pin-init` API items to prelude
  rust: init: add `Zeroable` trait and `init::zeroed` function
  rust: init: add `stack_pin_init!` macro
  ...
 2023-04-30 11:20:22 -07:00
Mark Rutland
ec570320b0 locking/atomic: Correct (cmp)xchg() instrumentation 
All xchg() and cmpxchg() ops are atomic RMWs, but currently we
instrument these with instrument_atomic_write() rather than
instrument_atomic_read_write(), missing the read aspect.

Similarly, all try_cmpxchg() ops are non-atomic RMWs on *oldp, but we
instrument these accesses with instrument_atomic_write() rather than
instrument_read_write(), missing the read aspect and erroneously marking
these as atomic.

Fix the instrumentation for both points.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20230413160644.490976-1-mark.rutland@arm.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
 2023-04-29 09:09:31 +02:00
Uros Bizjak
e6ce9d7411 locking/atomic: Add generic try_cmpxchg{,64}_local() support 
Add generic support for try_cmpxchg{,64}_local() and their falbacks.

These provides the generic try_cmpxchg_local family of functions
from the arch_ prefixed version, also adding explicit instrumentation.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20230405141710.3551-2-ubizjak@gmail.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
 2023-04-29 09:09:02 +02:00
Linus Torvalds
89d77f71f4 RISC-V Patches for the 6.4 Merge Window, Part 1 
* Support for runtime detection of the Svnapot extension.
 * Support for Zicboz when clearing pages.
 * We've moved to GENERIC_ENTRY.
 * Support for !MMU on rv32 systems.
 * The linear region is now mapped via huge pages.
 * Support for building relocatable kernels.
 * Support for the hwprobe interface.
 * Various fixes and cleanups throughout the tree.
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Merge tag 'riscv-for-linus-6.4-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull RISC-V updates from Palmer Dabbelt:

 - Support for runtime detection of the Svnapot extension

 - Support for Zicboz when clearing pages

 - We've moved to GENERIC_ENTRY

 - Support for !MMU on rv32 systems

 - The linear region is now mapped via huge pages

 - Support for building relocatable kernels

 - Support for the hwprobe interface

 - Various fixes and cleanups throughout the tree

* tag 'riscv-for-linus-6.4-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (57 commits)
  RISC-V: hwprobe: Explicity check for -1 in vdso init
  RISC-V: hwprobe: There can only be one first
  riscv: Allow to downgrade paging mode from the command line
  dt-bindings: riscv: add sv57 mmu-type
  RISC-V: hwprobe: Remove __init on probe_vendor_features()
  riscv: Use --emit-relocs in order to move .rela.dyn in init
  riscv: Check relocations at compile time
  powerpc: Move script to check relocations at compile time in scripts/
  riscv: Introduce CONFIG_RELOCATABLE
  riscv: Move .rela.dyn outside of init to avoid empty relocations
  riscv: Prepare EFI header for relocatable kernels
  riscv: Unconditionnally select KASAN_VMALLOC if KASAN
  riscv: Fix ptdump when KASAN is enabled
  riscv: Fix EFI stub usage of KASAN instrumented strcmp function
  riscv: Move DTB_EARLY_BASE_VA to the kernel address space
  riscv: Rework kasan population functions
  riscv: Split early and final KASAN population functions
  riscv: Use PUD/P4D/PGD pages for the linear mapping
  riscv: Move the linear mapping creation in its own function
  riscv: Get rid of riscv_pfn_base variable
  ...
 2023-04-28 16:55:39 -07:00
Linus Torvalds
d579c468d7 tracing updates for 6.4: 
- User events are finally ready!
   After lots of collaboration between various parties, we finally locked
   down on a stable interface for user events that can also work with user
   space only tracing. This is implemented by telling the kernel (or user
   space library, but that part is user space only and not part of this
   patch set), where the variable is that the application uses to know if
   something is listening to the trace. There's also an interface to tell
   the kernel about these events, which will show up in the
   /sys/kernel/tracing/events/user_events/ directory, where it can be
    enabled. When it's enabled, the kernel will update the variable, to tell
   the application to start writing to the kernel.
   See https://lwn.net/Articles/927595/
 
 - Cleaned up the direct trampolines code to simplify arm64 addition of
   direct trampolines. Direct trampolines use the ftrace interface but
   instead of jumping to the ftrace trampoline, applications (mostly BPF)
   can register their own trampoline for performance reasons.
 
 - Some updates to the fprobe infrastructure. fprobes are more efficient than
   kprobes, as it does not need to save all the registers that kprobes on
   ftrace do. More work needs to be done before the fprobes will be exposed
   as dynamic events.
 
 - More updates to references to the obsolete path of
   /sys/kernel/debug/tracing for the new /sys/kernel/tracing path.
 
 - Add a seq_buf_do_printk() helper to seq_bufs, to print a large buffer line
   by line instead of all at once. There's users in production kernels that
   have a large data dump that originally used printk() directly, but the
   data dump was larger than what printk() allowed as a single print.
   Using seq_buf() to do the printing fixes that.
 
 - Add /sys/kernel/tracing/touched_functions that shows all functions that
   was every traced by ftrace or a direct trampoline. This is used for
   debugging issues where a traced function could have caused a crash by
   a bpf program or live patching.
 
 - Add a "fields" option that is similar to "raw" but outputs the fields of
   the events. It's easier to read by humans.
 
 - Some minor fixes and clean ups.
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Merge tag 'trace-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing updates from Steven Rostedt:

 - User events are finally ready!

   After lots of collaboration between various parties, we finally
   locked down on a stable interface for user events that can also work
   with user space only tracing.

   This is implemented by telling the kernel (or user space library, but
   that part is user space only and not part of this patch set), where
   the variable is that the application uses to know if something is
   listening to the trace.

   There's also an interface to tell the kernel about these events,
   which will show up in the /sys/kernel/tracing/events/user_events/
   directory, where it can be enabled.

   When it's enabled, the kernel will update the variable, to tell the
   application to start writing to the kernel.

   See https://lwn.net/Articles/927595/

 - Cleaned up the direct trampolines code to simplify arm64 addition of
   direct trampolines.

   Direct trampolines use the ftrace interface but instead of jumping to
   the ftrace trampoline, applications (mostly BPF) can register their
   own trampoline for performance reasons.

 - Some updates to the fprobe infrastructure. fprobes are more efficient
   than kprobes, as it does not need to save all the registers that
   kprobes on ftrace do. More work needs to be done before the fprobes
   will be exposed as dynamic events.

 - More updates to references to the obsolete path of
   /sys/kernel/debug/tracing for the new /sys/kernel/tracing path.

 - Add a seq_buf_do_printk() helper to seq_bufs, to print a large buffer
   line by line instead of all at once.

   There are users in production kernels that have a large data dump
   that originally used printk() directly, but the data dump was larger
   than what printk() allowed as a single print.

   Using seq_buf() to do the printing fixes that.

 - Add /sys/kernel/tracing/touched_functions that shows all functions
   that was every traced by ftrace or a direct trampoline. This is used
   for debugging issues where a traced function could have caused a
   crash by a bpf program or live patching.

 - Add a "fields" option that is similar to "raw" but outputs the fields
   of the events. It's easier to read by humans.

 - Some minor fixes and clean ups.

* tag 'trace-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (41 commits)
  ring-buffer: Sync IRQ works before buffer destruction
  tracing: Add missing spaces in trace_print_hex_seq()
  ring-buffer: Ensure proper resetting of atomic variables in ring_buffer_reset_online_cpus
  recordmcount: Fix memory leaks in the uwrite function
  tracing/user_events: Limit max fault-in attempts
  tracing/user_events: Prevent same address and bit per process
  tracing/user_events: Ensure bit is cleared on unregister
  tracing/user_events: Ensure write index cannot be negative
  seq_buf: Add seq_buf_do_printk() helper
  tracing: Fix print_fields() for __dyn_loc/__rel_loc
  tracing/user_events: Set event filter_type from type
  ring-buffer: Clearly check null ptr returned by rb_set_head_page()
  tracing: Unbreak user events
  tracing/user_events: Use print_format_fields() for trace output
  tracing/user_events: Align structs with tabs for readability
  tracing/user_events: Limit global user_event count
  tracing/user_events: Charge event allocs to cgroups
  tracing/user_events: Update documentation for ABI
  tracing/user_events: Use write ABI in example
  tracing/user_events: Add ABI self-test
  ...
 2023-04-28 15:57:53 -07:00
Linus Torvalds
2aff7c706c Objtool changes for v6.4: 
- Mark arch_cpu_idle_dead() __noreturn, make all architectures & drivers that did
    this inconsistently follow this new, common convention, and fix all the fallout
    that objtool can now detect statically.
 
  - Fix/improve the ORC unwinder becoming unreliable due to UNWIND_HINT_EMPTY ambiguity,
    split it into UNWIND_HINT_END_OF_STACK and UNWIND_HINT_UNDEFINED to resolve it.
 
  - Fix noinstr violations in the KCSAN code and the lkdtm/stackleak code.
 
  - Generate ORC data for __pfx code
 
  - Add more __noreturn annotations to various kernel startup/shutdown/panic functions.
 
  - Misc improvements & fixes.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool updates from Ingo Molnar:

 - Mark arch_cpu_idle_dead() __noreturn, make all architectures &
   drivers that did this inconsistently follow this new, common
   convention, and fix all the fallout that objtool can now detect
   statically

 - Fix/improve the ORC unwinder becoming unreliable due to
   UNWIND_HINT_EMPTY ambiguity, split it into UNWIND_HINT_END_OF_STACK
   and UNWIND_HINT_UNDEFINED to resolve it

 - Fix noinstr violations in the KCSAN code and the lkdtm/stackleak code

 - Generate ORC data for __pfx code

 - Add more __noreturn annotations to various kernel startup/shutdown
   and panic functions

 - Misc improvements & fixes

* tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits)
  x86/hyperv: Mark hv_ghcb_terminate() as noreturn
  scsi: message: fusion: Mark mpt_halt_firmware() __noreturn
  x86/cpu: Mark {hlt,resume}_play_dead() __noreturn
  btrfs: Mark btrfs_assertfail() __noreturn
  objtool: Include weak functions in global_noreturns check
  cpu: Mark nmi_panic_self_stop() __noreturn
  cpu: Mark panic_smp_self_stop() __noreturn
  arm64/cpu: Mark cpu_park_loop() and friends __noreturn
  x86/head: Mark *_start_kernel() __noreturn
  init: Mark start_kernel() __noreturn
  init: Mark [arch_call_]rest_init() __noreturn
  objtool: Generate ORC data for __pfx code
  x86/linkage: Fix padding for typed functions
  objtool: Separate prefix code from stack validation code
  objtool: Remove superfluous dead_end_function() check
  objtool: Add symbol iteration helpers
  objtool: Add WARN_INSN()
  scripts/objdump-func: Support multiple functions
  context_tracking: Fix KCSAN noinstr violation
  objtool: Add stackleak instrumentation to uaccess safe list
  ...
 2023-04-28 14:02:54 -07:00
Linus Torvalds
33afd4b763 Mainly singleton patches all over the place. Series of note are: 
- updates to scripts/gdb from Glenn Washburn
 
 - kexec cleanups from Bjorn Helgaas
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Merge tag 'mm-nonmm-stable-2023-04-27-16-01' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull non-MM updates from Andrew Morton:
 "Mainly singleton patches all over the place.

  Series of note are:

   - updates to scripts/gdb from Glenn Washburn

   - kexec cleanups from Bjorn Helgaas"

* tag 'mm-nonmm-stable-2023-04-27-16-01' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (50 commits)
  mailmap: add entries for Paul Mackerras
  libgcc: add forward declarations for generic library routines
  mailmap: add entry for Oleksandr
  ocfs2: reduce ioctl stack usage
  fs/proc: add Kthread flag to /proc/$pid/status
  ia64: fix an addr to taddr in huge_pte_offset()
  checkpatch: introduce proper bindings license check
  epoll: rename global epmutex
  scripts/gdb: add GDB convenience functions $lx_dentry_name() and $lx_i_dentry()
  scripts/gdb: create linux/vfs.py for VFS related GDB helpers
  uapi/linux/const.h: prefer ISO-friendly __typeof__
  delayacct: track delays from IRQ/SOFTIRQ
  scripts/gdb: timerlist: convert int chunks to str
  scripts/gdb: print interrupts
  scripts/gdb: raise error with reduced debugging information
  scripts/gdb: add a Radix Tree Parser
  lib/rbtree: use '+' instead of '|' for setting color.
  proc/stat: remove arch_idle_time()
  checkpatch: check for misuse of the link tags
  checkpatch: allow Closes tags with links
  ...
 2023-04-27 19:57:00 -07:00
Linus Torvalds
7fa8a8ee94 - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of 
switching from a user process to a kernel thread.
 
 - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav.
 
 - zsmalloc performance improvements from Sergey Senozhatsky.
 
 - Yue Zhao has found and fixed some data race issues around the
   alteration of memcg userspace tunables.
 
 - VFS rationalizations from Christoph Hellwig:
 
   - removal of most of the callers of write_one_page().
 
   - make __filemap_get_folio()'s return value more useful
 
 - Luis Chamberlain has changed tmpfs so it no longer requires swap
   backing.  Use `mount -o noswap'.
 
 - Qi Zheng has made the slab shrinkers operate locklessly, providing
   some scalability benefits.
 
 - Keith Busch has improved dmapool's performance, making part of its
   operations O(1) rather than O(n).
 
 - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd,
   permitting userspace to wr-protect anon memory unpopulated ptes.
 
 - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather
   than exclusive, and has fixed a bunch of errors which were caused by its
   unintuitive meaning.
 
 - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature,
   which causes minor faults to install a write-protected pte.
 
 - Vlastimil Babka has done some maintenance work on vma_merge():
   cleanups to the kernel code and improvements to our userspace test
   harness.
 
 - Cleanups to do_fault_around() by Lorenzo Stoakes.
 
 - Mike Rapoport has moved a lot of initialization code out of various
   mm/ files and into mm/mm_init.c.
 
 - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for
   DRM, but DRM doesn't use it any more.
 
 - Lorenzo has also coverted read_kcore() and vread() to use iterators
   and has thereby removed the use of bounce buffers in some cases.
 
 - Lorenzo has also contributed further cleanups of vma_merge().
 
 - Chaitanya Prakash provides some fixes to the mmap selftesting code.
 
 - Matthew Wilcox changes xfs and afs so they no longer take sleeping
   locks in ->map_page(), a step towards RCUification of pagefaults.
 
 - Suren Baghdasaryan has improved mmap_lock scalability by switching to
   per-VMA locking.
 
 - Frederic Weisbecker has reworked the percpu cache draining so that it
   no longer causes latency glitches on cpu isolated workloads.
 
 - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig
   logic.
 
 - Liu Shixin has changed zswap's initialization so we no longer waste a
   chunk of memory if zswap is not being used.
 
 - Yosry Ahmed has improved the performance of memcg statistics flushing.
 
 - David Stevens has fixed several issues involving khugepaged,
   userfaultfd and shmem.
 
 - Christoph Hellwig has provided some cleanup work to zram's IO-related
   code paths.
 
 - David Hildenbrand has fixed up some issues in the selftest code's
   testing of our pte state changing.
 
 - Pankaj Raghav has made page_endio() unneeded and has removed it.
 
 - Peter Xu contributed some rationalizations of the userfaultfd
   selftests.
 
 - Yosry Ahmed has fixed an issue around memcg's page recalim accounting.
 
 - Chaitanya Prakash has fixed some arm-related issues in the
   selftests/mm code.
 
 - Longlong Xia has improved the way in which KSM handles hwpoisoned
   pages.
 
 - Peter Xu fixes a few issues with uffd-wp at fork() time.
 
 - Stefan Roesch has changed KSM so that it may now be used on a
   per-process and per-cgroup basis.
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Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull MM updates from Andrew Morton:

 - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
   switching from a user process to a kernel thread.

 - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj
   Raghav.

 - zsmalloc performance improvements from Sergey Senozhatsky.

 - Yue Zhao has found and fixed some data race issues around the
   alteration of memcg userspace tunables.

 - VFS rationalizations from Christoph Hellwig:
     - removal of most of the callers of write_one_page()
     - make __filemap_get_folio()'s return value more useful

 - Luis Chamberlain has changed tmpfs so it no longer requires swap
   backing. Use `mount -o noswap'.

 - Qi Zheng has made the slab shrinkers operate locklessly, providing
   some scalability benefits.

 - Keith Busch has improved dmapool's performance, making part of its
   operations O(1) rather than O(n).

 - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd,
   permitting userspace to wr-protect anon memory unpopulated ptes.

 - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive
   rather than exclusive, and has fixed a bunch of errors which were
   caused by its unintuitive meaning.

 - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature,
   which causes minor faults to install a write-protected pte.

 - Vlastimil Babka has done some maintenance work on vma_merge():
   cleanups to the kernel code and improvements to our userspace test
   harness.

 - Cleanups to do_fault_around() by Lorenzo Stoakes.

 - Mike Rapoport has moved a lot of initialization code out of various
   mm/ files and into mm/mm_init.c.

 - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for
   DRM, but DRM doesn't use it any more.

 - Lorenzo has also coverted read_kcore() and vread() to use iterators
   and has thereby removed the use of bounce buffers in some cases.

 - Lorenzo has also contributed further cleanups of vma_merge().

 - Chaitanya Prakash provides some fixes to the mmap selftesting code.

 - Matthew Wilcox changes xfs and afs so they no longer take sleeping
   locks in ->map_page(), a step towards RCUification of pagefaults.

 - Suren Baghdasaryan has improved mmap_lock scalability by switching to
   per-VMA locking.

 - Frederic Weisbecker has reworked the percpu cache draining so that it
   no longer causes latency glitches on cpu isolated workloads.

 - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig
   logic.

 - Liu Shixin has changed zswap's initialization so we no longer waste a
   chunk of memory if zswap is not being used.

 - Yosry Ahmed has improved the performance of memcg statistics
   flushing.

 - David Stevens has fixed several issues involving khugepaged,
   userfaultfd and shmem.

 - Christoph Hellwig has provided some cleanup work to zram's IO-related
   code paths.

 - David Hildenbrand has fixed up some issues in the selftest code's
   testing of our pte state changing.

 - Pankaj Raghav has made page_endio() unneeded and has removed it.

 - Peter Xu contributed some rationalizations of the userfaultfd
   selftests.

 - Yosry Ahmed has fixed an issue around memcg's page recalim
   accounting.

 - Chaitanya Prakash has fixed some arm-related issues in the
   selftests/mm code.

 - Longlong Xia has improved the way in which KSM handles hwpoisoned
   pages.

 - Peter Xu fixes a few issues with uffd-wp at fork() time.

 - Stefan Roesch has changed KSM so that it may now be used on a
   per-process and per-cgroup basis.

* tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits)
  mm,unmap: avoid flushing TLB in batch if PTE is inaccessible
  shmem: restrict noswap option to initial user namespace
  mm/khugepaged: fix conflicting mods to collapse_file()
  sparse: remove unnecessary 0 values from rc
  mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area()
  hugetlb: pte_alloc_huge() to replace huge pte_alloc_map()
  maple_tree: fix allocation in mas_sparse_area()
  mm: do not increment pgfault stats when page fault handler retries
  zsmalloc: allow only one active pool compaction context
  selftests/mm: add new selftests for KSM
  mm: add new KSM process and sysfs knobs
  mm: add new api to enable ksm per process
  mm: shrinkers: fix debugfs file permissions
  mm: don't check VMA write permissions if the PTE/PMD indicates write permissions
  migrate_pages_batch: fix statistics for longterm pin retry
  userfaultfd: use helper function range_in_vma()
  lib/show_mem.c: use for_each_populated_zone() simplify code
  mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list()
  fs/buffer: convert create_page_buffers to folio_create_buffers
  fs/buffer: add folio_create_empty_buffers helper
  ...
 2023-04-27 19:42:02 -07:00
Linus Torvalds
513f17f8d6 sh updates for v6.4 
- sh: Use generic GCC library routines
 - sh: sq: Use the bitmap API when applicable
 - sh: sq: Fix incorrect element size for allocating bitmap buffer
 - sh: pci: Remove unused variable in SH-7786 PCI Express code
 - sh: mcount.S: fix build error when PRINTK is not enabled
 - sh: remove sh5/sh64 last fragments
 - sh: math-emu: fix macro redefined warning
 - sh: init: use OF_EARLY_FLATTREE for early init
 - sh: nmi_debug: fix return value of __setup handler
 - sh: SH2007: drop the bad URL info
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Merge tag 'sh-for-v6.4-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux

Pull sh updates from John Paul Adrian Glaubitz:
 "This is a bit larger than my previous one and mainly consists of
  clean-up work in the arch/sh directory by Geert Uytterhoeven and Randy
  Dunlap.

  Additionally, this fixes a bug in the Storage Queue code that was
  discovered while I was reviewing a patch to switch the code to the
  bitmap API by Christophe Jaillet.

  So this contains both a fix for the original bug in the Storage Queue
  code that can be backported later as well as the Christophe's patch to
  swich the code to the bitmap API.

  Summary:

   - Use generic GCC library routines

   - sq: Use the bitmap API when applicable

   - sq: Fix incorrect element size for allocating bitmap buffer

   - pci: Remove unused variable in SH-7786 PCI Express code

   - mcount.S: fix build error when PRINTK is not enabled

   - remove sh5/sh64 last fragments

   - math-emu: fix macro redefined warning

   - init: use OF_EARLY_FLATTREE for early init

   - nmi_debug: fix return value of __setup handler

   - SH2007: drop the bad URL info"

* tag 'sh-for-v6.4-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/glaubitz/sh-linux:
  sh: Replace <uapi/asm/types.h> by <asm-generic/int-ll64.h>
  sh: Use generic GCC library routines
  sh: sq: Use the bitmap API when applicable
  sh: sq: Fix incorrect element size for allocating bitmap buffer
  sh: pci: Remove unused variable in SH-7786 PCI Express code
  sh: mcount.S: fix build error when PRINTK is not enabled
  sh: remove sh5/sh64 last fragments
  sh: math-emu: fix macro redefined warning
  sh: init: use OF_EARLY_FLATTREE for early init
  sh: nmi_debug: fix return value of __setup handler
  sh: SH2007: drop the bad URL info
 2023-04-27 17:41:23 -07:00
Linus Torvalds
b6a7828502 modules-6.4-rc1 
The summary of the changes for this pull requests is:
 
  * Song Liu's new struct module_memory replacement
  * Nick Alcock's MODULE_LICENSE() removal for non-modules
  * My cleanups and enhancements to reduce the areas where we vmalloc
    module memory for duplicates, and the respective debug code which
    proves the remaining vmalloc pressure comes from userspace.
 
 Most of the changes have been in linux-next for quite some time except
 the minor fixes I made to check if a module was already loaded
 prior to allocating the final module memory with vmalloc and the
 respective debug code it introduces to help clarify the issue. Although
 the functional change is small it is rather safe as it can only *help*
 reduce vmalloc space for duplicates and is confirmed to fix a bootup
 issue with over 400 CPUs with KASAN enabled. I don't expect stable
 kernels to pick up that fix as the cleanups would have also had to have
 been picked up. Folks on larger CPU systems with modules will want to
 just upgrade if vmalloc space has been an issue on bootup.
 
 Given the size of this request, here's some more elaborate details
 on this pull request.
 
 The functional change change in this pull request is the very first
 patch from Song Liu which replaces the struct module_layout with a new
 struct module memory. The old data structure tried to put together all
 types of supported module memory types in one data structure, the new
 one abstracts the differences in memory types in a module to allow each
 one to provide their own set of details. This paves the way in the
 future so we can deal with them in a cleaner way. If you look at changes
 they also provide a nice cleanup of how we handle these different memory
 areas in a module. This change has been in linux-next since before the
 merge window opened for v6.3 so to provide more than a full kernel cycle
 of testing. It's a good thing as quite a bit of fixes have been found
 for it.
 
 Jason Baron then made dynamic debug a first class citizen module user by
 using module notifier callbacks to allocate / remove module specific
 dynamic debug information.
 
 Nick Alcock has done quite a bit of work cross-tree to remove module
 license tags from things which cannot possibly be module at my request
 so to:
 
   a) help him with his longer term tooling goals which require a
      deterministic evaluation if a piece a symbol code could ever be
      part of a module or not. But quite recently it is has been made
      clear that tooling is not the only one that would benefit.
      Disambiguating symbols also helps efforts such as live patching,
      kprobes and BPF, but for other reasons and R&D on this area
      is active with no clear solution in sight.
 
   b) help us inch closer to the now generally accepted long term goal
      of automating all the MODULE_LICENSE() tags from SPDX license tags
 
 In so far as a) is concerned, although module license tags are a no-op
 for non-modules, tools which would want create a mapping of possible
 modules can only rely on the module license tag after the commit
 8b41fc4454 ("kbuild: create modules.builtin without Makefile.modbuiltin
 or tristate.conf").  Nick has been working on this *for years* and
 AFAICT I was the only one to suggest two alternatives to this approach
 for tooling. The complexity in one of my suggested approaches lies in
 that we'd need a possible-obj-m and a could-be-module which would check
 if the object being built is part of any kconfig build which could ever
 lead to it being part of a module, and if so define a new define
 -DPOSSIBLE_MODULE [0]. A more obvious yet theoretical approach I've
 suggested would be to have a tristate in kconfig imply the same new
 -DPOSSIBLE_MODULE as well but that means getting kconfig symbol names
 mapping to modules always, and I don't think that's the case today. I am
 not aware of Nick or anyone exploring either of these options. Quite
 recently Josh Poimboeuf has pointed out that live patching, kprobes and
 BPF would benefit from resolving some part of the disambiguation as
 well but for other reasons. The function granularity KASLR (fgkaslr)
 patches were mentioned but Joe Lawrence has clarified this effort has
 been dropped with no clear solution in sight [1].
 
 In the meantime removing module license tags from code which could never
 be modules is welcomed for both objectives mentioned above. Some
 developers have also welcomed these changes as it has helped clarify
 when a module was never possible and they forgot to clean this up,
 and so you'll see quite a bit of Nick's patches in other pull
 requests for this merge window. I just picked up the stragglers after
 rc3. LWN has good coverage on the motivation behind this work [2] and
 the typical cross-tree issues he ran into along the way. The only
 concrete blocker issue he ran into was that we should not remove the
 MODULE_LICENSE() tags from files which have no SPDX tags yet, even if
 they can never be modules. Nick ended up giving up on his efforts due
 to having to do this vetting and backlash he ran into from folks who
 really did *not understand* the core of the issue nor were providing
 any alternative / guidance. I've gone through his changes and dropped
 the patches which dropped the module license tags where an SPDX
 license tag was missing, it only consisted of 11 drivers.  To see
 if a pull request deals with a file which lacks SPDX tags you
 can just use:
 
   ./scripts/spdxcheck.py -f \
 	$(git diff --name-only commid-id | xargs echo)
 
 You'll see a core module file in this pull request for the above,
 but that's not related to his changes. WE just need to add the SPDX
 license tag for the kernel/module/kmod.c file in the future but
 it demonstrates the effectiveness of the script.
 
 Most of Nick's changes were spread out through different trees,
 and I just picked up the slack after rc3 for the last kernel was out.
 Those changes have been in linux-next for over two weeks.
 
 The cleanups, debug code I added and final fix I added for modules
 were motivated by David Hildenbrand's report of boot failing on
 a systems with over 400 CPUs when KASAN was enabled due to running
 out of virtual memory space. Although the functional change only
 consists of 3 lines in the patch "module: avoid allocation if module is
 already present and ready", proving that this was the best we can
 do on the modules side took quite a bit of effort and new debug code.
 
 The initial cleanups I did on the modules side of things has been
 in linux-next since around rc3 of the last kernel, the actual final
 fix for and debug code however have only been in linux-next for about a
 week or so but I think it is worth getting that code in for this merge
 window as it does help fix / prove / evaluate the issues reported
 with larger number of CPUs. Userspace is not yet fixed as it is taking
 a bit of time for folks to understand the crux of the issue and find a
 proper resolution. Worst come to worst, I have a kludge-of-concept [3]
 of how to make kernel_read*() calls for modules unique / converge them,
 but I'm currently inclined to just see if userspace can fix this
 instead.
 
 [0] https://lore.kernel.org/all/Y/kXDqW+7d71C4wz@bombadil.infradead.org/
 [1] https://lkml.kernel.org/r/025f2151-ce7c-5630-9b90-98742c97ac65@redhat.com
 [2] https://lwn.net/Articles/927569/
 [3] https://lkml.kernel.org/r/20230414052840.1994456-3-mcgrof@kernel.org
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Merge tag 'modules-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux

Pull module updates from Luis Chamberlain:
 "The summary of the changes for this pull requests is:

   - Song Liu's new struct module_memory replacement

   - Nick Alcock's MODULE_LICENSE() removal for non-modules

   - My cleanups and enhancements to reduce the areas where we vmalloc
     module memory for duplicates, and the respective debug code which
     proves the remaining vmalloc pressure comes from userspace.

  Most of the changes have been in linux-next for quite some time except
  the minor fixes I made to check if a module was already loaded prior
  to allocating the final module memory with vmalloc and the respective
  debug code it introduces to help clarify the issue. Although the
  functional change is small it is rather safe as it can only *help*
  reduce vmalloc space for duplicates and is confirmed to fix a bootup
  issue with over 400 CPUs with KASAN enabled. I don't expect stable
  kernels to pick up that fix as the cleanups would have also had to
  have been picked up. Folks on larger CPU systems with modules will
  want to just upgrade if vmalloc space has been an issue on bootup.

  Given the size of this request, here's some more elaborate details:

  The functional change change in this pull request is the very first
  patch from Song Liu which replaces the 'struct module_layout' with a
  new 'struct module_memory'. The old data structure tried to put
  together all types of supported module memory types in one data
  structure, the new one abstracts the differences in memory types in a
  module to allow each one to provide their own set of details. This
  paves the way in the future so we can deal with them in a cleaner way.
  If you look at changes they also provide a nice cleanup of how we
  handle these different memory areas in a module. This change has been
  in linux-next since before the merge window opened for v6.3 so to
  provide more than a full kernel cycle of testing. It's a good thing as
  quite a bit of fixes have been found for it.

  Jason Baron then made dynamic debug a first class citizen module user
  by using module notifier callbacks to allocate / remove module
  specific dynamic debug information.

  Nick Alcock has done quite a bit of work cross-tree to remove module
  license tags from things which cannot possibly be module at my request
  so to:

   a) help him with his longer term tooling goals which require a
      deterministic evaluation if a piece a symbol code could ever be
      part of a module or not. But quite recently it is has been made
      clear that tooling is not the only one that would benefit.
      Disambiguating symbols also helps efforts such as live patching,
      kprobes and BPF, but for other reasons and R&D on this area is
      active with no clear solution in sight.

   b) help us inch closer to the now generally accepted long term goal
      of automating all the MODULE_LICENSE() tags from SPDX license tags

  In so far as a) is concerned, although module license tags are a no-op
  for non-modules, tools which would want create a mapping of possible
  modules can only rely on the module license tag after the commit
  8b41fc4454 ("kbuild: create modules.builtin without
  Makefile.modbuiltin or tristate.conf").

  Nick has been working on this *for years* and AFAICT I was the only
  one to suggest two alternatives to this approach for tooling. The
  complexity in one of my suggested approaches lies in that we'd need a
  possible-obj-m and a could-be-module which would check if the object
  being built is part of any kconfig build which could ever lead to it
  being part of a module, and if so define a new define
  -DPOSSIBLE_MODULE [0].

  A more obvious yet theoretical approach I've suggested would be to
  have a tristate in kconfig imply the same new -DPOSSIBLE_MODULE as
  well but that means getting kconfig symbol names mapping to modules
  always, and I don't think that's the case today. I am not aware of
  Nick or anyone exploring either of these options. Quite recently Josh
  Poimboeuf has pointed out that live patching, kprobes and BPF would
  benefit from resolving some part of the disambiguation as well but for
  other reasons. The function granularity KASLR (fgkaslr) patches were
  mentioned but Joe Lawrence has clarified this effort has been dropped
  with no clear solution in sight [1].

  In the meantime removing module license tags from code which could
  never be modules is welcomed for both objectives mentioned above. Some
  developers have also welcomed these changes as it has helped clarify
  when a module was never possible and they forgot to clean this up, and
  so you'll see quite a bit of Nick's patches in other pull requests for
  this merge window. I just picked up the stragglers after rc3. LWN has
  good coverage on the motivation behind this work [2] and the typical
  cross-tree issues he ran into along the way. The only concrete blocker
  issue he ran into was that we should not remove the MODULE_LICENSE()
  tags from files which have no SPDX tags yet, even if they can never be
  modules. Nick ended up giving up on his efforts due to having to do
  this vetting and backlash he ran into from folks who really did *not
  understand* the core of the issue nor were providing any alternative /
  guidance. I've gone through his changes and dropped the patches which
  dropped the module license tags where an SPDX license tag was missing,
  it only consisted of 11 drivers. To see if a pull request deals with a
  file which lacks SPDX tags you can just use:

    ./scripts/spdxcheck.py -f \
	$(git diff --name-only commid-id | xargs echo)

  You'll see a core module file in this pull request for the above, but
  that's not related to his changes. WE just need to add the SPDX
  license tag for the kernel/module/kmod.c file in the future but it
  demonstrates the effectiveness of the script.

  Most of Nick's changes were spread out through different trees, and I
  just picked up the slack after rc3 for the last kernel was out. Those
  changes have been in linux-next for over two weeks.

  The cleanups, debug code I added and final fix I added for modules
  were motivated by David Hildenbrand's report of boot failing on a
  systems with over 400 CPUs when KASAN was enabled due to running out
  of virtual memory space. Although the functional change only consists
  of 3 lines in the patch "module: avoid allocation if module is already
  present and ready", proving that this was the best we can do on the
  modules side took quite a bit of effort and new debug code.

  The initial cleanups I did on the modules side of things has been in
  linux-next since around rc3 of the last kernel, the actual final fix
  for and debug code however have only been in linux-next for about a
  week or so but I think it is worth getting that code in for this merge
  window as it does help fix / prove / evaluate the issues reported with
  larger number of CPUs. Userspace is not yet fixed as it is taking a
  bit of time for folks to understand the crux of the issue and find a
  proper resolution. Worst come to worst, I have a kludge-of-concept [3]
  of how to make kernel_read*() calls for modules unique / converge
  them, but I'm currently inclined to just see if userspace can fix this
  instead"

Link: https://lore.kernel.org/all/Y/kXDqW+7d71C4wz@bombadil.infradead.org/ [0]
Link: https://lkml.kernel.org/r/025f2151-ce7c-5630-9b90-98742c97ac65@redhat.com [1]
Link: https://lwn.net/Articles/927569/ [2]
Link: https://lkml.kernel.org/r/20230414052840.1994456-3-mcgrof@kernel.org [3]

* tag 'modules-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux: (121 commits)
  module: add debugging auto-load duplicate module support
  module: stats: fix invalid_mod_bytes typo
  module: remove use of uninitialized variable len
  module: fix building stats for 32-bit targets
  module: stats: include uapi/linux/module.h
  module: avoid allocation if module is already present and ready
  module: add debug stats to help identify memory pressure
  module: extract patient module check into helper
  modules/kmod: replace implementation with a semaphore
  Change DEFINE_SEMAPHORE() to take a number argument
  module: fix kmemleak annotations for non init ELF sections
  module: Ignore L0 and rename is_arm_mapping_symbol()
  module: Move is_arm_mapping_symbol() to module_symbol.h
  module: Sync code of is_arm_mapping_symbol()
  scripts/gdb: use mem instead of core_layout to get the module address
  interconnect: remove module-related code
  interconnect: remove MODULE_LICENSE in non-modules
  zswap: remove MODULE_LICENSE in non-modules
  zpool: remove MODULE_LICENSE in non-modules
  x86/mm/dump_pagetables: remove MODULE_LICENSE in non-modules
  ...
 2023-04-27 16:36:55 -07:00
Linus Torvalds
cec24b8b6b Char/Misc drivers for 6.4-rc1 
Here is the "big" set of char/misc and other driver subsystems for
 6.4-rc1.
 
 It's pretty big, but due to the removal of pcmcia drivers, almost breaks
 even for number of lines added vs. removed, a nice change.
 
 Included in here are:
   - removal of unused PCMCIA drivers (finally!)
   - Interconnect driver updates and additions
   - Lots of IIO driver updates and additions
   - MHI driver updates
   - Coresight driver updates
   - NVMEM driver updates, which required some OF updates
   - W1 driver updates and a new maintainer to manage the subsystem
   - FPGA driver updates
   - New driver subsystem, CDX, for AMD systems
   - lots of other small driver updates and additions
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc drivers updates from Greg KH:
 "Here is the "big" set of char/misc and other driver subsystems for
  6.4-rc1.

  It's pretty big, but due to the removal of pcmcia drivers, almost
  breaks even for number of lines added vs. removed, a nice change.

  Included in here are:

   - removal of unused PCMCIA drivers (finally!)

   - Interconnect driver updates and additions

   - Lots of IIO driver updates and additions

   - MHI driver updates

   - Coresight driver updates

   - NVMEM driver updates, which required some OF updates

   - W1 driver updates and a new maintainer to manage the subsystem

   - FPGA driver updates

   - New driver subsystem, CDX, for AMD systems

   - lots of other small driver updates and additions

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (196 commits)
  mcb-lpc: Reallocate memory region to avoid memory overlapping
  mcb-pci: Reallocate memory region to avoid memory overlapping
  mcb: Return actual parsed size when reading chameleon table
  kernel/configs: Drop Android config fragments
  virt: acrn: Replace obsolete memalign() with posix_memalign()
  spmi: Add a check for remove callback when removing a SPMI driver
  spmi: fix W=1 kernel-doc warnings
  spmi: mtk-pmif: Drop of_match_ptr for ID table
  spmi: pmic-arb: Convert to platform remove callback returning void
  spmi: mtk-pmif: Convert to platform remove callback returning void
  spmi: hisi-spmi-controller: Convert to platform remove callback returning void
  w1: gpio: remove unnecessary ENOMEM messages
  w1: omap-hdq: remove unnecessary ENOMEM messages
  w1: omap-hdq: add SPDX tag
  w1: omap-hdq: allow compile testing
  w1: matrox: remove unnecessary ENOMEM messages
  w1: matrox: use inline over __inline__
  w1: matrox: switch from asm to linux header
  w1: ds2482: do not use assignment in if condition
  w1: ds2482: drop unnecessary header
  ...
 2023-04-27 12:07:50 -07:00
Linus Torvalds
6e98b09da9 Networking changes for 6.4. 
Core
 ----
 
  - Introduce a config option to tweak MAX_SKB_FRAGS. Increasing the
    default value allows for better BIG TCP performances.
 
  - Reduce compound page head access for zero-copy data transfers.
 
  - RPS/RFS improvements, avoiding unneeded NET_RX_SOFTIRQ when possible.
 
  - Threaded NAPI improvements, adding defer skb free support and unneeded
    softirq avoidance.
 
  - Address dst_entry reference count scalability issues, via false
    sharing avoidance and optimize refcount tracking.
 
  - Add lockless accesses annotation to sk_err[_soft].
 
  - Optimize again the skb struct layout.
 
  - Extends the skb drop reasons to make it usable by multiple
    subsystems.
 
  - Better const qualifier awareness for socket casts.
 
 BPF
 ---
 
  - Add skb and XDP typed dynptrs which allow BPF programs for more
    ergonomic and less brittle iteration through data and variable-sized
    accesses.
 
  - Add a new BPF netfilter program type and minimal support to hook
    BPF programs to netfilter hooks such as prerouting or forward.
 
  - Add more precise memory usage reporting for all BPF map types.
 
  - Adds support for using {FOU,GUE} encap with an ipip device operating
    in collect_md mode and add a set of BPF kfuncs for controlling encap
    params.
 
  - Allow BPF programs to detect at load time whether a particular kfunc
    exists or not, and also add support for this in light skeleton.
 
  - Bigger batch of BPF verifier improvements to prepare for upcoming BPF
    open-coded iterators allowing for less restrictive looping capabilities.
 
  - Rework RCU enforcement in the verifier, add kptr_rcu and enforce BPF
    programs to NULL-check before passing such pointers into kfunc.
 
  - Add support for kptrs in percpu hashmaps, percpu LRU hashmaps and in
    local storage maps.
 
  - Enable RCU semantics for task BPF kptrs and allow referenced kptr
    tasks to be stored in BPF maps.
 
  - Add support for refcounted local kptrs to the verifier for allowing
    shared ownership, useful for adding a node to both the BPF list and
    rbtree.
 
  - Add BPF verifier support for ST instructions in convert_ctx_access()
    which will help new -mcpu=v4 clang flag to start emitting them.
 
  - Add ARM32 USDT support to libbpf.
 
  - Improve bpftool's visual program dump which produces the control
    flow graph in a DOT format by adding C source inline annotations.
 
 Protocols
 ---------
 
  - IPv4: Allow adding to IPv4 address a 'protocol' tag. Such value
    indicates the provenance of the IP address.
 
  - IPv6: optimize route lookup, dropping unneeded R/W lock acquisition.
 
  - Add the handshake upcall mechanism, allowing the user-space
    to implement generic TLS handshake on kernel's behalf.
 
  - Bridge: support per-{Port, VLAN} neighbor suppression, increasing
    resilience to nodes failures.
 
  - SCTP: add support for Fair Capacity and Weighted Fair Queueing
    schedulers.
 
  - MPTCP: delay first subflow allocation up to its first usage. This
    will allow for later better LSM interaction.
 
  - xfrm: Remove inner/outer modes from input/output path. These are
    not needed anymore.
 
  - WiFi:
    - reduced neighbor report (RNR) handling for AP mode
    - HW timestamping support
    - support for randomized auth/deauth TA for PASN privacy
    - per-link debugfs for multi-link
    - TC offload support for mac80211 drivers
    - mac80211 mesh fast-xmit and fast-rx support
    - enable Wi-Fi 7 (EHT) mesh support
 
 Netfilter
 ---------
 
  - Add nf_tables 'brouting' support, to force a packet to be routed
    instead of being bridged.
 
  - Update bridge netfilter and ovs conntrack helpers to handle
    IPv6 Jumbo packets properly, i.e. fetch the packet length
    from hop-by-hop extension header. This is needed for BIT TCP
    support.
 
  - The iptables 32bit compat interface isn't compiled in by default
    anymore.
 
  - Move ip(6)tables builtin icmp matches to the udptcp one.
    This has the advantage that icmp/icmpv6 match doesn't load the
    iptables/ip6tables modules anymore when iptables-nft is used.
 
  - Extended netlink error report for netdevice in flowtables and
    netdev/chains. Allow for incrementally add/delete devices to netdev
    basechain. Allow to create netdev chain without device.
 
 Driver API
 ----------
 
  - Remove redundant Device Control Error Reporting Enable, as PCI core
    has already error reporting enabled at enumeration time.
 
  - Move Multicast DB netlink handlers to core, allowing devices other
    then bridge to use them.
 
  - Allow the page_pool to directly recycle the pages from safely
    localized NAPI.
 
  - Implement lockless TX queue stop/wake combo macros, allowing for
    further code de-duplication and sanitization.
 
  - Add YNL support for user headers and struct attrs.
 
  - Add partial YNL specification for devlink.
 
  - Add partial YNL specification for ethtool.
 
  - Add tc-mqprio and tc-taprio support for preemptible traffic classes.
 
  - Add tx push buf len param to ethtool, specifies the maximum number
    of bytes of a transmitted packet a driver can push directly to the
    underlying device.
 
  - Add basic LED support for switch/phy.
 
  - Add NAPI documentation, stop relaying on external links.
 
  - Convert dsa_master_ioctl() to netdev notifier. This is a preparatory
    work to make the hardware timestamping layer selectable by user
    space.
 
  - Add transceiver support and improve the error messages for CAN-FD
    controllers.
 
 New hardware / drivers
 ----------------------
 
  - Ethernet:
    - AMD/Pensando core device support
    - MediaTek MT7981 SoC
    - MediaTek MT7988 SoC
    - Broadcom BCM53134 embedded switch
    - Texas Instruments CPSW9G ethernet switch
    - Qualcomm EMAC3 DWMAC ethernet
    - StarFive JH7110 SoC
    - NXP CBTX ethernet PHY
 
  - WiFi:
    - Apple M1 Pro/Max devices
    - RealTek rtl8710bu/rtl8188gu
    - RealTek rtl8822bs, rtl8822cs and rtl8821cs SDIO chipset
 
  - Bluetooth:
    - Realtek RTL8821CS, RTL8851B, RTL8852BS
    - Mediatek MT7663, MT7922
    - NXP w8997
    - Actions Semi ATS2851
    - QTI WCN6855
    - Marvell 88W8997
 
  - Can:
    - STMicroelectronics bxcan stm32f429
 
 Drivers
 -------
  - Ethernet NICs:
    - Intel (1G, icg):
      - add tracking and reporting of QBV config errors.
      - add support for configuring max SDU for each Tx queue.
    - Intel (100G, ice):
      - refactor mailbox overflow detection to support Scalable IOV
      - GNSS interface optimization
    - Intel (i40e):
      - support XDP multi-buffer
    - nVidia/Mellanox:
      - add the support for linux bridge multicast offload
      - enable TC offload for egress and engress MACVLAN over bond
      - add support for VxLAN GBP encap/decap flows offload
      - extend packet offload to fully support libreswan
      - support tunnel mode in mlx5 IPsec packet offload
      - extend XDP multi-buffer support
      - support MACsec VLAN offload
      - add support for dynamic msix vectors allocation
      - drop RX page_cache and fully use page_pool
      - implement thermal zone to report NIC temperature
    - Netronome/Corigine:
      - add support for multi-zone conntrack offload
    - Solarflare/Xilinx:
      - support offloading TC VLAN push/pop actions to the MAE
      - support TC decap rules
      - support unicast PTP
 
  - Other NICs:
    - Broadcom (bnxt): enforce software based freq adjustments only
 		on shared PHC NIC
    - RealTek (r8169): refactor to addess ASPM issues during NAPI poll.
    - Micrel (lan8841): add support for PTP_PF_PEROUT
    - Cadence (macb): enable PTP unicast
    - Engleder (tsnep): add XDP socket zero-copy support
    - virtio-net: implement exact header length guest feature
    - veth: add page_pool support for page recycling
    - vxlan: add MDB data path support
    - gve: add XDP support for GQI-QPL format
    - geneve: accept every ethertype
    - macvlan: allow some packets to bypass broadcast queue
    - mana: add support for jumbo frame
 
  - Ethernet high-speed switches:
    - Microchip (sparx5): Add support for TC flower templates.
 
  - Ethernet embedded switches:
    - Broadcom (b54):
      - configure 6318 and 63268 RGMII ports
    - Marvell (mv88e6xxx):
      - faster C45 bus scan
    - Microchip:
      - lan966x:
        - add support for IS1 VCAP
        - better TX/RX from/to CPU performances
      - ksz9477: add ETS Qdisc support
      - ksz8: enhance static MAC table operations and error handling
      - sama7g5: add PTP capability
    - NXP (ocelot):
      - add support for external ports
      - add support for preemptible traffic classes
    - Texas Instruments:
      - add CPSWxG SGMII support for J7200 and J721E
 
  - Intel WiFi (iwlwifi):
    - preparation for Wi-Fi 7 EHT and multi-link support
    - EHT (Wi-Fi 7) sniffer support
    - hardware timestamping support for some devices/firwmares
    - TX beacon protection on newer hardware
 
  - Qualcomm 802.11ax WiFi (ath11k):
    - MU-MIMO parameters support
    - ack signal support for management packets
 
  - RealTek WiFi (rtw88):
    - SDIO bus support
    - better support for some SDIO devices
      (e.g. MAC address from efuse)
 
  - RealTek WiFi (rtw89):
    - HW scan support for 8852b
    - better support for 6 GHz scanning
    - support for various newer firmware APIs
    - framework firmware backwards compatibility
 
  - MediaTek WiFi (mt76):
    - P2P support
    - mesh A-MSDU support
    - EHT (Wi-Fi 7) support
    - coredump support
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core:

   - Introduce a config option to tweak MAX_SKB_FRAGS. Increasing the
     default value allows for better BIG TCP performances

   - Reduce compound page head access for zero-copy data transfers

   - RPS/RFS improvements, avoiding unneeded NET_RX_SOFTIRQ when
     possible

   - Threaded NAPI improvements, adding defer skb free support and
     unneeded softirq avoidance

   - Address dst_entry reference count scalability issues, via false
     sharing avoidance and optimize refcount tracking

   - Add lockless accesses annotation to sk_err[_soft]

   - Optimize again the skb struct layout

   - Extends the skb drop reasons to make it usable by multiple
     subsystems

   - Better const qualifier awareness for socket casts

  BPF:

   - Add skb and XDP typed dynptrs which allow BPF programs for more
     ergonomic and less brittle iteration through data and
     variable-sized accesses

   - Add a new BPF netfilter program type and minimal support to hook
     BPF programs to netfilter hooks such as prerouting or forward

   - Add more precise memory usage reporting for all BPF map types

   - Adds support for using {FOU,GUE} encap with an ipip device
     operating in collect_md mode and add a set of BPF kfuncs for
     controlling encap params

   - Allow BPF programs to detect at load time whether a particular
     kfunc exists or not, and also add support for this in light
     skeleton

   - Bigger batch of BPF verifier improvements to prepare for upcoming
     BPF open-coded iterators allowing for less restrictive looping
     capabilities

   - Rework RCU enforcement in the verifier, add kptr_rcu and enforce
     BPF programs to NULL-check before passing such pointers into kfunc

   - Add support for kptrs in percpu hashmaps, percpu LRU hashmaps and
     in local storage maps

   - Enable RCU semantics for task BPF kptrs and allow referenced kptr
     tasks to be stored in BPF maps

   - Add support for refcounted local kptrs to the verifier for allowing
     shared ownership, useful for adding a node to both the BPF list and
     rbtree

   - Add BPF verifier support for ST instructions in
     convert_ctx_access() which will help new -mcpu=v4 clang flag to
     start emitting them

   - Add ARM32 USDT support to libbpf

   - Improve bpftool's visual program dump which produces the control
     flow graph in a DOT format by adding C source inline annotations

  Protocols:

   - IPv4: Allow adding to IPv4 address a 'protocol' tag. Such value
     indicates the provenance of the IP address

   - IPv6: optimize route lookup, dropping unneeded R/W lock acquisition

   - Add the handshake upcall mechanism, allowing the user-space to
     implement generic TLS handshake on kernel's behalf

   - Bridge: support per-{Port, VLAN} neighbor suppression, increasing
     resilience to nodes failures

   - SCTP: add support for Fair Capacity and Weighted Fair Queueing
     schedulers

   - MPTCP: delay first subflow allocation up to its first usage. This
     will allow for later better LSM interaction

   - xfrm: Remove inner/outer modes from input/output path. These are
     not needed anymore

   - WiFi:
      - reduced neighbor report (RNR) handling for AP mode
      - HW timestamping support
      - support for randomized auth/deauth TA for PASN privacy
      - per-link debugfs for multi-link
      - TC offload support for mac80211 drivers
      - mac80211 mesh fast-xmit and fast-rx support
      - enable Wi-Fi 7 (EHT) mesh support

  Netfilter:

   - Add nf_tables 'brouting' support, to force a packet to be routed
     instead of being bridged

   - Update bridge netfilter and ovs conntrack helpers to handle IPv6
     Jumbo packets properly, i.e. fetch the packet length from
     hop-by-hop extension header. This is needed for BIT TCP support

   - The iptables 32bit compat interface isn't compiled in by default
     anymore

   - Move ip(6)tables builtin icmp matches to the udptcp one. This has
     the advantage that icmp/icmpv6 match doesn't load the
     iptables/ip6tables modules anymore when iptables-nft is used

   - Extended netlink error report for netdevice in flowtables and
     netdev/chains. Allow for incrementally add/delete devices to netdev
     basechain. Allow to create netdev chain without device

  Driver API:

   - Remove redundant Device Control Error Reporting Enable, as PCI core
     has already error reporting enabled at enumeration time

   - Move Multicast DB netlink handlers to core, allowing devices other
     then bridge to use them

   - Allow the page_pool to directly recycle the pages from safely
     localized NAPI

   - Implement lockless TX queue stop/wake combo macros, allowing for
     further code de-duplication and sanitization

   - Add YNL support for user headers and struct attrs

   - Add partial YNL specification for devlink

   - Add partial YNL specification for ethtool

   - Add tc-mqprio and tc-taprio support for preemptible traffic classes

   - Add tx push buf len param to ethtool, specifies the maximum number
     of bytes of a transmitted packet a driver can push directly to the
     underlying device

   - Add basic LED support for switch/phy

   - Add NAPI documentation, stop relaying on external links

   - Convert dsa_master_ioctl() to netdev notifier. This is a
     preparatory work to make the hardware timestamping layer selectable
     by user space

   - Add transceiver support and improve the error messages for CAN-FD
     controllers

  New hardware / drivers:

   - Ethernet:
      - AMD/Pensando core device support
      - MediaTek MT7981 SoC
      - MediaTek MT7988 SoC
      - Broadcom BCM53134 embedded switch
      - Texas Instruments CPSW9G ethernet switch
      - Qualcomm EMAC3 DWMAC ethernet
      - StarFive JH7110 SoC
      - NXP CBTX ethernet PHY

   - WiFi:
      - Apple M1 Pro/Max devices
      - RealTek rtl8710bu/rtl8188gu
      - RealTek rtl8822bs, rtl8822cs and rtl8821cs SDIO chipset

   - Bluetooth:
      - Realtek RTL8821CS, RTL8851B, RTL8852BS
      - Mediatek MT7663, MT7922
      - NXP w8997
      - Actions Semi ATS2851
      - QTI WCN6855
      - Marvell 88W8997

   - Can:
      - STMicroelectronics bxcan stm32f429

  Drivers:

   - Ethernet NICs:
      - Intel (1G, icg):
         - add tracking and reporting of QBV config errors
         - add support for configuring max SDU for each Tx queue
      - Intel (100G, ice):
         - refactor mailbox overflow detection to support Scalable IOV
         - GNSS interface optimization
      - Intel (i40e):
         - support XDP multi-buffer
      - nVidia/Mellanox:
         - add the support for linux bridge multicast offload
         - enable TC offload for egress and engress MACVLAN over bond
         - add support for VxLAN GBP encap/decap flows offload
         - extend packet offload to fully support libreswan
         - support tunnel mode in mlx5 IPsec packet offload
         - extend XDP multi-buffer support
         - support MACsec VLAN offload
         - add support for dynamic msix vectors allocation
         - drop RX page_cache and fully use page_pool
         - implement thermal zone to report NIC temperature
      - Netronome/Corigine:
         - add support for multi-zone conntrack offload
      - Solarflare/Xilinx:
         - support offloading TC VLAN push/pop actions to the MAE
         - support TC decap rules
         - support unicast PTP

   - Other NICs:
      - Broadcom (bnxt): enforce software based freq adjustments only on
        shared PHC NIC
      - RealTek (r8169): refactor to addess ASPM issues during NAPI poll
      - Micrel (lan8841): add support for PTP_PF_PEROUT
      - Cadence (macb): enable PTP unicast
      - Engleder (tsnep): add XDP socket zero-copy support
      - virtio-net: implement exact header length guest feature
      - veth: add page_pool support for page recycling
      - vxlan: add MDB data path support
      - gve: add XDP support for GQI-QPL format
      - geneve: accept every ethertype
      - macvlan: allow some packets to bypass broadcast queue
      - mana: add support for jumbo frame

   - Ethernet high-speed switches:
      - Microchip (sparx5): Add support for TC flower templates

   - Ethernet embedded switches:
      - Broadcom (b54):
         - configure 6318 and 63268 RGMII ports
      - Marvell (mv88e6xxx):
         - faster C45 bus scan
      - Microchip:
         - lan966x:
            - add support for IS1 VCAP
            - better TX/RX from/to CPU performances
         - ksz9477: add ETS Qdisc support
         - ksz8: enhance static MAC table operations and error handling
         - sama7g5: add PTP capability
      - NXP (ocelot):
         - add support for external ports
         - add support for preemptible traffic classes
      - Texas Instruments:
         - add CPSWxG SGMII support for J7200 and J721E

   - Intel WiFi (iwlwifi):
      - preparation for Wi-Fi 7 EHT and multi-link support
      - EHT (Wi-Fi 7) sniffer support
      - hardware timestamping support for some devices/firwmares
      - TX beacon protection on newer hardware

   - Qualcomm 802.11ax WiFi (ath11k):
      - MU-MIMO parameters support
      - ack signal support for management packets

   - RealTek WiFi (rtw88):
      - SDIO bus support
      - better support for some SDIO devices (e.g. MAC address from
        efuse)

   - RealTek WiFi (rtw89):
      - HW scan support for 8852b
      - better support for 6 GHz scanning
      - support for various newer firmware APIs
      - framework firmware backwards compatibility

   - MediaTek WiFi (mt76):
      - P2P support
      - mesh A-MSDU support
      - EHT (Wi-Fi 7) support
      - coredump support"

* tag 'net-next-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2078 commits)
  net: phy: hide the PHYLIB_LEDS knob
  net: phy: marvell-88x2222: remove unnecessary (void*) conversions
  tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp.
  net: amd: Fix link leak when verifying config failed
  net: phy: marvell: Fix inconsistent indenting in led_blink_set
  lan966x: Don't use xdp_frame when action is XDP_TX
  tsnep: Add XDP socket zero-copy TX support
  tsnep: Add XDP socket zero-copy RX support
  tsnep: Move skb receive action to separate function
  tsnep: Add functions for queue enable/disable
  tsnep: Rework TX/RX queue initialization
  tsnep: Replace modulo operation with mask
  net: phy: dp83867: Add led_brightness_set support
  net: phy: Fix reading LED reg property
  drivers: nfc: nfcsim: remove return value check of `dev_dir`
  net: phy: dp83867: Remove unnecessary (void*) conversions
  net: ethtool: coalesce: try to make user settings stick twice
  net: mana: Check if netdev/napi_alloc_frag returns single page
  net: mana: Rename mana_refill_rxoob and remove some empty lines
  net: veth: add page_pool stats
  ...
 2023-04-26 16:07:23 -07:00
Masahiro Yamada
9892bd72ef kbuild: deb-pkg: specify targets in debian/rules as .PHONY 
If a file with the same name exists, the target is not run.

For example, the following command fails.

  $ make O=build-arch bindeb-pkg
    [ snip ]
  sed: can't read modules.order: No such file or directory
  make[6]: *** [../Makefile:1577: __modinst_pre] Error 2
  make[5]: *** [../scripts/Makefile.package:150: intdeb-pkg] Error 2
  make[4]: *** [../Makefile:1657: intdeb-pkg] Error 2
  make[3]: *** [debian/rules:14: binary-arch] Error 2
  dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
  make[2]: *** [../scripts/Makefile.package:139: bindeb-pkg] Error 2

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
 2023-04-26 21:10:51 +09:00
Hao Zeng
fa359d0685 recordmcount: Fix memory leaks in the uwrite function 
Common realloc mistake: 'file_append' nulled but not freed upon failure

Link: https://lkml.kernel.org/r/20230426010527.703093-1-zenghao@kylinos.cn

Signed-off-by: Hao Zeng <zenghao@kylinos.cn>
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
 2023-04-25 21:10:20 -04:00
Linus Torvalds
53b5e72b9d asm-generic updates for 6.4 
These are various cleanups, fixing a number of uapi header files to no
 longer reference CONFIG_* symbols, and one patch that introduces the
 new CONFIG_HAS_IOPORT symbol for architectures that provide working
 inb()/outb() macros, as a preparation for adding driver dependencies
 on those in the following release.
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Merge tag 'asm-generic-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic updates from Arnd Bergmann:
 "These are various cleanups, fixing a number of uapi header files to no
  longer reference CONFIG_* symbols, and one patch that introduces the
  new CONFIG_HAS_IOPORT symbol for architectures that provide working
  inb()/outb() macros, as a preparation for adding driver dependencies
  on those in the following release"

* tag 'asm-generic-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  Kconfig: introduce HAS_IOPORT option and select it as necessary
  scripts: Update the CONFIG_* ignore list in headers_install.sh
  pktcdvd: Remove CONFIG_CDROM_PKTCDVD_WCACHE from uapi header
  Move bp_type_idx to include/linux/hw_breakpoint.h
  Move ep_take_care_of_epollwakeup() to fs/eventpoll.c
  Move COMPAT_ATM_ADDPARTY to net/atm/svc.c
 2023-04-25 12:22:11 -07:00
Linus Torvalds
d53c3eaaef ARM: SoC devicetree changes for 6.4 
The devicetree changes overall are again dominated by the Qualcomm
 Snapdragon platform that weighs in at over 300 changesets, but there
 are many updates across other platforms as well, notably Mediatek, NXP,
 Rockchips, Renesas, TI, Samsung and ST Microelectronics. These all
 add new features for existing machines, as well as new machines and
 SoCs.
 
 The newly added SoCs are:
 
  - Allwinner T113-s, an Cortex-A7 based variant of the RISC-V
    based D1 chip.
 
  - StarFive JH7110, a RISC-V SoC based on the Sifive U74 core
    like its JH7100 predecessor, but with additional CPU cores
    and a GPU.
 
  - Apple M2 as used in current Macbook Air/Pro and Mac Mini
    gets added, with comparable support as its M1 predecessor.
 
  - Unisoc UMS512 (Tiger T610) is a midrange smartphone SoC
 
  - Qualcomm IPQ5332 and IPQ9574 are Wi-Fi 7 networking SoCs,
    based on the Cortex-A53 and Cortex-A73 cores, respectively.
 
  - Qualcomm sa8775p is an automotive SoC derived from the
    Snapdragon family.
 
 Including the initial board support for the added SoC platforms,
 there are 52 new machines. The largest group are 19 boards
 industrial embedded boards based on the NXP i.MX6 (32-bit)
 and i.MX8 (64-bit) families.
 
 Others include:
 
  - Two boards based on the Allwinner f1c200s ultra-low-cost chip
 
  - Three "Banana Pi" variants based on the Amlogic g12b
    (A311D, S922X) SoC.
 
  - The Gl.Inet mv1000 router based on Marvell Armada 3720
 
  - A Wifi/LTE Dongle based on Qualcomm msm8916
 
  - Two robotics boards based on Qualcomm QRB chips
 
  - Three Snapdragon based phones made by Xiaomi
 
  - Five developments boards based on various Rockchip SoCs,
    including the rk3588s-khadas-edge2 and a few NanoPi
    models
 
  - The AM625 Beagleplay industrial SBC
 
 Another 14 machines get removed: both boards for the obsolete "oxnas"
 platform, three boards for the Renesas r8a77950 SoC that were only for
 pre-production chips, and various chromebook models based on the Qualcomm
 Sc7180 "trogdor" design that were never part of products.
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Merge tag 'soc-dt-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC devicetree updates from Arnd Bergmann:
 "The devicetree changes overall are again dominated by the Qualcomm
  Snapdragon platform that weighs in at over 300 changesets, but there
  are many updates across other platforms as well, notably Mediatek,
  NXP, Rockchips, Renesas, TI, Samsung and ST Microelectronics. These
  all add new features for existing machines, as well as new machines
  and SoCs.

  The newly added SoCs are:

   - Allwinner T113-s, an Cortex-A7 based variant of the RISC-V based D1
     chip.

   - StarFive JH7110, a RISC-V SoC based on the Sifive U74 core like its
     JH7100 predecessor, but with additional CPU cores and a GPU.

   - Apple M2 as used in current Macbook Air/Pro and Mac Mini gets
     added, with comparable support as its M1 predecessor.

   - Unisoc UMS512 (Tiger T610) is a midrange smartphone SoC

   - Qualcomm IPQ5332 and IPQ9574 are Wi-Fi 7 networking SoCs, based on
     the Cortex-A53 and Cortex-A73 cores, respectively.

   - Qualcomm sa8775p is an automotive SoC derived from the Snapdragon
     family.

  Including the initial board support for the added SoC platforms, there
  are 52 new machines. The largest group are 19 boards industrial
  embedded boards based on the NXP i.MX6 (32-bit) and i.MX8 (64-bit)
  families.

  Others include:

   - Two boards based on the Allwinner f1c200s ultra-low-cost chip

   - Three 'Banana Pi' variants based on the Amlogic g12b (A311D, S922X)
     SoC.

   - The Gl.Inet mv1000 router based on Marvell Armada 3720

   - A Wifi/LTE Dongle based on Qualcomm msm8916

   - Two robotics boards based on Qualcomm QRB chips

   - Three Snapdragon based phones made by Xiaomi

   - Five developments boards based on various Rockchip SoCs, including
     the rk3588s-khadas-edge2 and a few NanoPi models

   - The AM625 Beagleplay industrial SBC

  Another 14 machines get removed: both boards for the obsolete 'oxnas'
  platform, three boards for the Renesas r8a77950 SoC that were only for
  pre-production chips, and various chromebook models based on the
  Qualcomm Sc7180 'trogdor' design that were never part of products"

* tag 'soc-dt-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (836 commits)
  arm64: dts: rockchip: Add support for volume keys to rk3399-pinephone-pro
  arm64: dts: rockchip: Add vdd_cpu_big regulators to rk3588-rock-5b
  arm64: dts: rockchip: Use generic name for es8316 on Pinebook Pro and Rock 5B
  arm64: dts: rockchip: Drop RTC clock-frequency on rk3588-rock-5b
  arm64: dts: apple: t8112: Add PWM controller
  arm64: dts: apple: t600x: Add PWM controller
  arm64: dts: apple: t8103: Add PWM controller
  arm64: dts: rockchip: Add pinctrl gpio-ranges for rk356x
  ARM: dts: nomadik: Replace deprecated spi-gpio properties
  ARM: dts: aspeed-g6: Add UDMA node
  ARM: dts: aspeed: greatlakes: add mctp device
  ARM: dts: aspeed: greatlakes: Add gpio names
  ARM: dts: aspeed: p10bmc: Change power supply info
  arm64: dts: mediatek: mt6795-xperia-m5: Add Bosch BMM050 Magnetometer
  arm64: dts: mediatek: mt6795-xperia-m5: Add Bosch BMA255 Accelerometer
  arm64: dts: mediatek: mt6795: Add tertiary PWM node
  arm64: dts: rockchip: add panel to Anbernic RG353 series
  dt-bindings: arm: Add Data Modul i.MX8M Plus eDM SBC
  dt-bindings: arm: fsl: Add chargebyte Tarragon
  dt-bindings: vendor-prefixes: add chargebyte
  ...
 2023-04-25 12:11:54 -07:00
Masahiro Yamada
c90b3bbff2 kbuild: rpm-pkg: remove kernel-drm PROVIDES 
This code was added more than 20 years ago. [1]

I checked the kernel spec files in Fedora and OpenSUSE, but did not
see 'kernel-drm'. I do not know if there exists a distro that uses it
in RPM dependency.

Remove this, and let's see if somebody complains about it.

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/history/history.git/commit/?id=6d956df7d6b716b28c910c4f5b360c4d44d96c4d

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
 2023-04-25 10:08:55 +09:00
Masahiro Yamada
1d29b4c223 kbuild: deb-pkg: add KDEB_SOURCE_COMPRESS to specify source compression 
Add KDEB_SOURCE_COMPRESS to specify the compression for the orig and
debian tarballs. (cf. the existing KDEB_COMPRESS is used to specify
the compression for binary packages.)

Supported algorithms are gzip, bzip2, lzma, and xz, all of which are
supported by dpkg-source.

The current default is gzip. You can change it via the environment
variable, for example, 'KDEB_SOURCE_COMPRESS=xz make deb-pkg'.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
 2023-04-25 10:04:19 +09:00
Linus Torvalds
5dfb75e842 RCU Changes for 6.4: 
o  MAINTAINERS files additions and changes.
  o  Fix hotplug warning in nohz code.
  o  Tick dependency changes by Zqiang.
  o  Lazy-RCU shrinker fixes by Zqiang.
  o  rcu-tasks stall reporting improvements by Neeraj.
  o  Initial changes for renaming of k[v]free_rcu() to its new k[v]free_rcu_mightsleep()
     name for robustness.
  o  Documentation Updates:
  o  Significant changes to srcu_struct size.
  o  Deadlock detection for srcu_read_lock() vs synchronize_srcu() from Boqun.
  o  rcutorture and rcu-related tool, which are targeted for v6.4 from Boqun's tree.
  o  Other misc changes.
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Merge tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux

Pull RCU updates from Joel Fernandes:

 - Updates and additions to MAINTAINERS files, with Boqun being added to
   the RCU entry and Zqiang being added as an RCU reviewer.

   I have also transitioned from reviewer to maintainer; however, Paul
   will be taking over sending RCU pull-requests for the next merge
   window.

 - Resolution of hotplug warning in nohz code, achieved by fixing
   cpu_is_hotpluggable() through interaction with the nohz subsystem.

   Tick dependency modifications by Zqiang, focusing on fixing usage of
   the TICK_DEP_BIT_RCU_EXP bitmask.

 - Avoid needless calls to the rcu-lazy shrinker for CONFIG_RCU_LAZY=n
   kernels, fixed by Zqiang.

 - Improvements to rcu-tasks stall reporting by Neeraj.

 - Initial renaming of k[v]free_rcu() to k[v]free_rcu_mightsleep() for
   increased robustness, affecting several components like mac802154,
   drbd, vmw_vmci, tracing, and more.

   A report by Eric Dumazet showed that the API could be unknowingly
   used in an atomic context, so we'd rather make sure they know what
   they're asking for by being explicit:

      https://lore.kernel.org/all/20221202052847.2623997-1-edumazet@google.com/

 - Documentation updates, including corrections to spelling,
   clarifications in comments, and improvements to the srcu_size_state
   comments.

 - Better srcu_struct cache locality for readers, by adjusting the size
   of srcu_struct in support of SRCU usage by Christoph Hellwig.

 - Teach lockdep to detect deadlocks between srcu_read_lock() vs
   synchronize_srcu() contributed by Boqun.

   Previously lockdep could not detect such deadlocks, now it can.

 - Integration of rcutorture and rcu-related tools, targeted for v6.4
   from Boqun's tree, featuring new SRCU deadlock scenarios, test_nmis
   module parameter, and more

 - Miscellaneous changes, various code cleanups and comment improvements

* tag 'rcu.6.4.april5.2023.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jfern/linux: (71 commits)
  checkpatch: Error out if deprecated RCU API used
  mac802154: Rename kfree_rcu() to kvfree_rcu_mightsleep()
  rcuscale: Rename kfree_rcu() to kfree_rcu_mightsleep()
  ext4/super: Rename kfree_rcu() to kfree_rcu_mightsleep()
  net/mlx5: Rename kfree_rcu() to kfree_rcu_mightsleep()
  net/sysctl: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
  lib/test_vmalloc.c: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
  tracing: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
  misc: vmw_vmci: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
  drbd: Rename kvfree_rcu() to kvfree_rcu_mightsleep()
  rcu: Protect rcu_print_task_exp_stall() ->exp_tasks access
  rcu: Avoid stack overflow due to __rcu_irq_enter_check_tick() being kprobe-ed
  rcu-tasks: Report stalls during synchronize_srcu() in rcu_tasks_postscan()
  rcu: Permit start_poll_synchronize_rcu_expedited() to be invoked early
  rcu: Remove never-set needwake assignment from rcu_report_qs_rdp()
  rcu: Register rcu-lazy shrinker only for CONFIG_RCU_LAZY=y kernels
  rcu: Fix missing TICK_DEP_MASK_RCU_EXP dependency check
  rcu: Fix set/clear TICK_DEP_BIT_RCU_EXP bitmask race
  rcu/trace: use strscpy() to instead of strncpy()
  tick/nohz: Fix cpu_is_hotpluggable() by checking with nohz subsystem
  ...
 2023-04-24 12:16:14 -07:00
Ruihan Li
1a261a6e10 scripts: Remove ICC-related dead code 
Intel compiler support has already been completely removed in commit
95207db816 ("Remove Intel compiler support").  However, it appears
that there is still some ICC-related code in scripts/cc-version.sh.
There is no harm in leaving the code as it is, but removing the dead
code makes the codebase a bit cleaner.

Hopefully all ICC-related stuff in the build scripts will be removed
after this commit, given the grep output as below:

	(linux/scripts) $ grep -i -w -R 'icc'
	cc-version.sh:ICC)
	cc-version.sh:	min_version=$($min_tool_version icc)
	dtc/include-prefixes/arm64/qcom/sm6350.dtsi:#include <dt-bindings/interconnect/qcom,icc.h>

Fixes: 95207db816 ("Remove Intel compiler support")
Signed-off-by: Ruihan Li <lrh2000@pku.edu.cn>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2023-04-24 10:18:32 -07:00
Linus Torvalds
8296ac9256 Kbuild fixes for v6.3 (4th) 
- Fix the prefix in the kernel source tarball
 
  - Fix a typo in the copyright file in Debian package
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Merge tag 'kbuild-fixes-v6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix the prefix in the kernel source tarball

 - Fix a typo in the copyright file in Debian package

* tag 'kbuild-fixes-v6.3-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: use proper prefix for tarballs to fix rpm-pkg build error
  kbuild: deb-pkg: Fix a spell typo in mkdebian script
 2023-04-23 08:22:25 -07:00
Masahiro Yamada
31f735c65d kbuild: add srcdeb-pkg target 
This new target builds only the debian source package.

Unify the build rules of deb-pkg, srcdeb-pkg, bindeb-pkg to avoid
code duplication.

--no-check-builddeps is added to srcdeb-pkg so that build dependencies
will not be checked.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
 2023-04-23 22:46:46 +09:00
Masahiro Yamada
9cedc5e89a kbuild: use proper prefix for tarballs to fix rpm-pkg build error 
Since commit f8d94c4e40 ("kbuild: do not create intermediate *.tar
for source tarballs"), 'make rpm-pkg' fails because the prefix of the
source tarball is 'linux.tar/' instead of 'linux/'. $(basename $@)
strips only '.gz' from the filename linux.tar.gz.

You need to strip two suffixes from compressed tarballs and one suffix
from uncompressed tarballs (for example 'perf-6.3.0.tar' generated by
'make perf-tar-src-pkg').

One tricky fix might be --prefix=$(firstword $(subst .tar, ,$@))/
but I think it is better to hard-code the prefix.

Fixes: f8d94c4e40 ("kbuild: do not create intermediate *.tar for source tarballs")
Reported-by: Jiwei Sun <sunjw10@lenovo.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
 2023-04-23 21:23:10 +09:00
Woody Suwalski
8b824220bd kbuild: deb-pkg: Fix a spell typo in mkdebian script 
Signed-off-by: Woody Suwalski <terraluna977@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
 2023-04-23 21:23:10 +09:00
Ekaterina Orlova
5a43001c01 ASN.1: Fix check for strdup() success 
It seems there is a misprint in the check of strdup() return code that
can lead to NULL pointer dereference.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 4520c6a49a ("X.509: Add simple ASN.1 grammar compiler")
Signed-off-by: Ekaterina Orlova <vorobushek.ok@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jarkko Sakkinen <jarkko@kernel.org>
Cc: keyrings@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Link: https://lore.kernel.org/r/20230315172130.140-1-vorobushek.ok@gmail.com/
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2023-04-21 08:58:00 -07:00
Jakub Kicinski
681c5b51dc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Adjacent changes:

net/mptcp/protocol.h
  63740448a3 ("mptcp: fix accept vs worker race")
  2a6a870e44 ("mptcp: stops worker on unaccepted sockets at listener close")
  ddb1a072f8 ("mptcp: move first subflow allocation at mpc access time")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2023-04-20 16:29:51 -07:00
Linus Torvalds
6a66fdd29e Rust fixes for v6.3 
- Build: Rust + GCC build fix and 'grep' warning fix.
 
  - Code: Missing 'extern "C"' fix.
 
  - Scripts: 'is_rust_module.sh' and 'generate_rust_analyzer.py' fixes.
 
  - A couple trivial fixes.
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Merge tag 'rust-fixes-6.3' of https://github.com/Rust-for-Linux/linux

Pull Rust fixes from Miguel Ojeda:
 "Most of these are straightforward.

  The last one is more complex, but it only touches Rust + GCC builds
  which are for the moment best-effort.

   - Code: Missing 'extern "C"' fix.

   - Scripts: 'is_rust_module.sh' and 'generate_rust_analyzer.py' fixes.

   - A couple trivial fixes

   - Build: Rust + GCC build fix and 'grep' warning fix"

* tag 'rust-fixes-6.3' of https://github.com/Rust-for-Linux/linux:
  rust: allow to use INIT_STACK_ALL_ZERO
  rust: fix regexp in scripts/is_rust_module.sh
  rust: build: Fix grep warning
  scripts: generate_rust_analyzer: Handle sub-modules with no Makefile
  rust: kernel: Mark rust_fmt_argument as extern "C"
  rust: sort uml documentation arch support table
  rust: str: fix requierments->requirements typo
 2023-04-20 12:46:18 -07:00
Andrea Righi
ccc4505454 rust: fix regexp in scripts/is_rust_module.sh 
nm can use "R" or "r" to show read-only data sections, but
scripts/is_rust_module.sh can only recognize "r", so with some versions
of binutils it can fail to detect if a module is a Rust module or not.

Right now we're using this script only to determine if we need to skip
BTF generation (that is disabled globally if CONFIG_RUST is enabled),
but it's still nice to fix this script to do the proper job.

Moreover, with this patch applied I can also relax the constraint of
"RUST depends on !DEBUG_INFO_BTF" and build a kernel with Rust and BTF
enabled at the same time (of course BTF generation is still skipped for
Rust modules).

[ Miguel: The actual reason is likely to be a change on the Rust
  compiler between 1.61.0 and 1.62.0:

    echo '#[used] static S: () = ();' |
        rustup run 1.61.0 rustc --emit=obj --crate-type=lib - &&
        nm rust_out.o

    echo '#[used] static S: () = ();' |
        rustup run 1.62.0 rustc --emit=obj --crate-type=lib - &&
        nm rust_out.o

  Gives:

    0000000000000000 r _ZN8rust_out1S17h48027ce0da975467E
    0000000000000000 R _ZN8rust_out1S17h58e1f3d9c0e97cefE

  See https://godbolt.org/z/KE6jneoo4. ]

Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Reviewed-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Reviewed-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
 2023-04-19 19:28:49 +02:00
Alexandre Ghiti
47981b5cc6
powerpc: Move script to check relocations at compile time in scripts/ 
Relocating kernel at runtime is done very early in the boot process, so
it is not convenient to check for relocations there and react in case a
relocation was not expected.

Powerpc architecture has a script that allows to check at compile time
for such unexpected relocations: extract the common logic to scripts/
so that other architectures can take advantage of it.

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Anup Patel <anup@brainfault.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Link: https://lore.kernel.org/r/20230329045329.64565-5-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
 2023-04-19 07:46:31 -07:00
Dmitry Rokosov
a04bb4c24a checkpatch: introduce proper bindings license check 
All headers from 'include/dt-bindings/' must be verified by checkpatch
together with Documentation bindings, because all of them are part of the
whole DT bindings system.

The requirement is dual licensed and matching patterns:
* Schemas:
    /GPL-2\.0(?:-only)? OR BSD-2-Clause/
* Headers:
    /GPL-2\.0(?:-only)? OR \S+/

Above patterns suggested by Rob at:
https://lore.kernel.org/all/CAL_Jsq+-YJsBO+LuPJ=ZQ=eb-monrwzuCppvReH+af7hYZzNaQ@mail.gmail.com

The issue was found during patch review:
https://lore.kernel.org/all/20230313201259.19998-4-ddrokosov@sberdevices.ru/

Link: https://lkml.kernel.org/r/20230404191715.7319-1-ddrokosov@sberdevices.ru
Signed-off-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:35 -07:00
Glenn Washburn
5a10562bde scripts/gdb: add GDB convenience functions $lx_dentry_name() and $lx_i_dentry() 
$lx_dentry_name() generates a full VFS path from a given dentry pointer,
and $lx_i_dentry() returns the dentry pointer associated with the given
inode pointer, if there is one.

Link: https://lkml.kernel.org/r/c9a5ad8efbfbd2cc6559e082734eed7628f43a16.1677631565.git.development@efficientek.com
Signed-off-by: Glenn Washburn <development@efficientek.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Antonio Borneo <antonio.borneo@foss.st.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:35 -07:00
Glenn Washburn
f4efbdaf59 scripts/gdb: create linux/vfs.py for VFS related GDB helpers 
Patch series "GDB VFS utils".

I've created a couple GDB convenience functions that I found useful when
debugging some VFS issues and figure others might find them useful.  For
instance, they are useful in setting conditional breakpoints on VFS
functions where you only care if the dentry path is a certain value.  I
took the opportunity to create a new "vfs" python module to give VFS
related utilities a home.


This patch (of 2):

This will allow for more VFS specific GDB helpers to be collected in one
place.  Move utils.dentry_name into the vfs modules.  Also a local
variable in proc.py was changed from vfs to mnt to prevent a naming
collision with the new vfs module.

[akpm@linux-foundation.org: add SPDX-License-Identifier]
Link: https://lkml.kernel.org/r/cover.1677631565.git.development@efficientek.com
Link: https://lkml.kernel.org/r/7bba4c065a8c2c47f1fc5b03a7278005b04db251.1677631565.git.development@efficientek.com
Signed-off-by: Glenn Washburn <development@efficientek.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Antonio Borneo <antonio.borneo@foss.st.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:34 -07:00
Amjad Ouled-Ameur
29692fc92c scripts/gdb: timerlist: convert int chunks to str 
join() expects strings but integers are given.

Convert chunks list to strings before passing it to join()

Link: https://lkml.kernel.org/r/20230406221217.1585486-4-f.fainelli@gmail.com
Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
Signed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:34 -07:00
Florian Fainelli
b0969d7687 scripts/gdb: print interrupts 
This GDB script prints the interrupts in the system in the same way that
/proc/interrupts does.  This does include the architecture specific part
done by arch_show_interrupts() for x86, ARM, ARM64 and MIPS.  Example
output from an ARM64 system:

(gdb) lx-interruptlist
           CPU0       CPU1       CPU2       CPU3
 10:       3167      1225      1276      2629     GICv2   30 Level     arch_timer
 13:          0         0         0         0     GICv2   36 Level     arm-pmu
 14:          0         0         0         0     GICv2   37 Level     arm-pmu
 15:          0         0         0         0     GICv2   38 Level     arm-pmu
 16:          0         0         0         0     GICv2   39 Level     arm-pmu
 28:          0         0         0         0  interrupt-controller@8410640    5 Edge      brcmstb-gpio-wake
 30:        125         0         0         0     GICv2  128 Level     ttyS0
 31:          0         0         0         0  interrupt-controller@8416000    0 Level     mspi_done
 32:          0         0         0         0  interrupt-controller@8410640    3 Edge      brcmstb-waketimer
 33:          0         0         0         0  interrupt-controller@8418580    8 Edge      brcmstb-waketimer-rtc
 34:        872         0         0         0     GICv2  230 Level     brcm_scmi@0
 35:          0         0         0         0  interrupt-controller@8410640   10 Edge      8d0f200.usb-phy
 37:          0         0         0         0     GICv2   97 Level     PCIe PME
 42:          0         0         0         0     GICv2  145 Level     xhci-hcd:usb1
 43:         94         0         0         0     GICv2   71 Level     mmc1
 44:          0         0         0         0     GICv2   70 Level     mmc0
IPI0:        23       666       154        98      Rescheduling interrupts
IPI1:       247      1053      1701       634      Function call interrupts
IPI2:         0         0         0         0      CPU stop interrupts
IPI3:         0         0         0         0      CPU stop (for crash dump) interrupts
IPI4:         0         0         0         0      Timer broadcast interrupts
IPI5:         7         9         5         0      IRQ work interrupts
IPI6:         0         0         0         0      CPU wake-up interrupts
ERR:          0

Link: https://lkml.kernel.org/r/20230406220451.1583239-1-f.fainelli@gmail.com
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:33 -07:00
Florian Fainelli
8af055ae25 scripts/gdb: raise error with reduced debugging information 
If CONFIG_DEBUG_INFO_REDUCED is enabled in the kernel configuration, we
will typically not be able to load vmlinux-gdb.py and will fail with:

Traceback (most recent call last):
  File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/vmlinux-gdb.py", line 25, in <module>
    import linux.utils
  File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/scripts/gdb/linux/utils.py", line 131, in <module>
    atomic_long_counter_offset = atomic_long_type.get_type()['counter'].bitpos
KeyError: 'counter'

Rather be left wondering what is happening only to find out that reduced
debug information is the cause, raise an eror.  This was not typically a
problem until e3c8d33e0d ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
but it has since then.

Link: https://lkml.kernel.org/r/20230406215252.1580538-1-f.fainelli@gmail.com
Fixes: e3c8d33e0d ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Antonio Borneo <antonio.borneo@foss.st.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:33 -07:00
Kieran Bingham
b7235d6bb5 scripts/gdb: add a Radix Tree Parser 
Linux makes use of the Radix Tree data structure to store pointers indexed
by integer values.  This structure is utilised across many structures in
the kernel including the IRQ descriptor tables, and several filesystems.

This module provides a method to lookup values from a structure given its
head node.

Usage:

The function lx_radix_tree_lookup, must be given a symbol of type struct
radix_tree_root, and an index into that tree.

The object returned is a generic integer value, and must be cast correctly
to the type based on the storage in the data structure.

For example, to print the irq descriptor in the sparse irq_desc_tree at
index 18, try the following:

(gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18)

This script previously existed under commit
e127a73d41 ("scripts/gdb: add a Radix Tree
Parser") and was later reverted with
b447e02548a3304c47b78b5e2d75a4312a8f17e1i (Revert "scripts/gdb: add a
Radix Tree Parser").

This version expects the XArray based radix tree implementation and has
been verified using QEMU/x86 on Linux 6.3-rc5.

[f.fainelli@gmail.com: revive and update for xarray implementation]
[f.fainelli@gmail.com: guard against a NULL node in the while loop]
  Link: https://lkml.kernel.org/r/20230405222743.1191674-1-f.fainelli@gmail.com
Link: https://lkml.kernel.org/r/20230404214049.1016811-1-f.fainelli@gmail.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:33 -07:00
Matthieu Baerts
d6ccdd678e checkpatch: check for misuse of the link tags 
"Link:" and "Closes:" tags have to be used with public URLs.

It is difficult to make sure the link is public but at least we can verify
the tag is followed by 'http(s)://'.

With that, we avoid such a tag that is not allowed [1]:

  Closes: <number>

Now that we check the "link" tags are followed by a URL, we can relax the
check linked to "Reported-by being followed by a link tag" to only verify
if a "link" tag is present after the "Reported-by" one.

Link: https://lore.kernel.org/linux-doc/CAHk-=wh0v1EeDV3v8TzK81nDC40=XuTdY2MCr0xy3m3FiBV3+Q@mail.gmail.com/ [1]
Link: https://lkml.kernel.org/r/20230314-doc-checkpatch-closes-tag-v4-5-d26d1fa66f9f@tessares.net
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@gmail.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kai Wasserbäch <kai@dev.carbon-project.org>
Cc: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:32 -07:00
Matthieu Baerts
44c3188809 checkpatch: allow Closes tags with links 
As a follow-up of a previous patch modifying the documentation to allow
using the "Closes:" tag, checkpatch.pl is updated accordingly.

checkpatch.pl now no longer complain when the "Closes:" tag is used by
itself:

  commit 76f381bb77 ("checkpatch: warn when unknown tags are used for links")

... or after the "Reported-by:" tag:

  commit d7f1d71e5e ("checkpatch: warn when Reported-by: is not followed by Link:")

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/373
Link: https://lkml.kernel.org/r/20230314-doc-checkpatch-closes-tag-v4-4-d26d1fa66f9f@tessares.net
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@gmail.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kai Wasserbäch <kai@dev.carbon-project.org>
Cc: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:32 -07:00
Matthieu Baerts
f94e40ea27 checkpatch: use a list of "link" tags 
The following commit will allow the use of a similar "link" tag.

Because there is a possibility that other similar tags will be added in
the future and to reduce the number of places where the code will be
modified to allow this new tag, a list with all these "link" tags is now
used.

Two variables are created from it: one to search for such tags and one to
print all tags in a warning message.

Link: https://lkml.kernel.org/r/20230314-doc-checkpatch-closes-tag-v4-3-d26d1fa66f9f@tessares.net
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Suggested-by: Joe Perches <joe@perches.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@gmail.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kai Wasserbäch <kai@dev.carbon-project.org>
Cc: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:32 -07:00
Matthieu Baerts
c917a872ce checkpatch: don't print the next line if not defined 
When checking if "Reported-by" tag is followed by "Link:", there is no
need to print the next line if there is no next line.

While at it, also mention in this case that the "Link:" tag should be
followed by a URL, similar to the next warning.

By doing that, the code is now similar to what is done above when checking
if the Co-developed-by tag is properly used.

Link: https://lkml.kernel.org/r/20230314-doc-checkpatch-closes-tag-v4-2-d26d1fa66f9f@tessares.net
Fixes: d7f1d71e5e ("checkpatch: warn when Reported-by: is not followed by Link:")
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Acked-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: David Airlie <airlied@gmail.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kai Wasserbäch <kai@dev.carbon-project.org>
Cc: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Thorsten Leemhuis <linux@leemhuis.info>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:32 -07:00
Peng Liu
8fc2a304f5 scripts/gdb: fix lx-timerlist for HRTIMER_MAX_CLOCK_BASES printing 
HRTIMER_MAX_CLOCK_BASES is of enum type hrtimer_base_type.  To print it as
an integer, HRTIMER_MAX_CLOCK_BASES should be converted first.

Link: https://lkml.kernel.org/r/TYCP286MB214640FF0E7F04AC3926A39EC6819@TYCP286MB2146.JPNP286.PROD.OUTLOOK.COM
Signed-off-by: Peng Liu <liupeng17@lenovo.com>
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 2023-04-18 16:39:31 -07:00