The top Makefile sets KBUILD_VERBOSE to 0 by default, it looks weird
now because V=1 and V=2 can be OR'ed as V=12. The default should be
empty.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Commit a6de553da0 ("kbuild: Allow to combine multiple W= levels")
supported W=123 to enable all the extra warning groups.
I think a similar idea is applicable to the V= option.
V=1 echos the whole command
V=2 prints the reason for rebuilding
These are orthogonal, and can be enabled at the same time.
This commit supports V=12 to enable both of them.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nicolas Schier <nicolas@fjasle.eu>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
"make V=1" prints the whole command instead of the short log, but I
think it is nicer to print both so that you can easily spot the build
rule of your interest.
This commit changes V=1 to print the short log (the line starts with
'#'), followed by the full log.
In parallel builds, the short/full logs from the same build rule may
be interspersed. If you want to avoid it, please add -Otarget option.
Kbuild will never set it by default because Make would buffer the logs
and lose the escape sequences. (Modern compilers print warnings and
errors in color, but only when they write to a terminal.)
This is also a preparation for supporting V=12 because V=2 appends the
reason for rebuilding to the short log.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nicolas Schier <nicolas@fjasle.eu>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
- Hide LDFLAGS_vmlinux from decompressor Makefiles to fix error messages
when GNU Make 4.4 is used.
- Fix 'make modules' build error when CONFIG_DEBUG_INFO_BTF_MODULES=y.
- Fix warnings emitted by GNU Make 4.4 in scripts/kconfig/Makefile.
- Support GNU Make 4.4 for scripts/jobserver-exec.
- Show clearer error message when kernel/gen_kheaders.sh fails due to
missing cpio.
-----BEGIN PGP SIGNATURE-----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=m1Ee
-----END PGP SIGNATURE-----
Merge tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Hide LDFLAGS_vmlinux from decompressor Makefiles to fix error
messages when GNU Make 4.4 is used.
- Fix 'make modules' build error when CONFIG_DEBUG_INFO_BTF_MODULES=y.
- Fix warnings emitted by GNU Make 4.4 in scripts/kconfig/Makefile.
- Support GNU Make 4.4 for scripts/jobserver-exec.
- Show clearer error message when kernel/gen_kheaders.sh fails due to
missing cpio.
* tag 'kbuild-fixes-v6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kheaders: explicitly validate existence of cpio command
scripts: support GNU make 4.4 in jobserver-exec
kconfig: Update all declared targets
scripts: rpm: make clear that mkspec script contains 4.13 feature
init/Kconfig: fix LOCALVERSION_AUTO help text
kbuild: fix 'make modules' error when CONFIG_DEBUG_INFO_BTF_MODULES=y
kbuild: export top-level LDFLAGS_vmlinux only to scripts/Makefile.vmlinux
init/version-timestamp.c: remove unneeded #include <linux/version.h>
docs: kbuild: remove mention to dropped $(objtree) feature
When CONFIG_DEBUG_INFO_BTF_MODULES=y, running 'make modules'
in the clean kernel tree will get the following error.
$ grep CONFIG_DEBUG_INFO_BTF_MODULES .config
CONFIG_DEBUG_INFO_BTF_MODULES=y
$ make -s clean
$ make modules
[snip]
AR vmlinux.a
ar: ./built-in.a: No such file or directory
make: *** [Makefile:1241: vmlinux.a] Error 1
'modules' depends on 'vmlinux', but builtin objects are not built.
Define KBUILD_BUILTIN.
Fixes: f73edc8951 ("kbuild: unify two modpost invocations")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Nathan Chancellor reports that $(NM) emits an error message when
GNU Make 4.4 is used to build the ARM zImage.
$ make-4.4 ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- O=build defconfig zImage
[snip]
LD vmlinux
NM System.map
SORTTAB vmlinux
OBJCOPY arch/arm/boot/Image
Kernel: arch/arm/boot/Image is ready
arm-linux-gnueabi-nm: 'arch/arm/boot/compressed/../../../../vmlinux': No such file
/bin/sh: 1: arithmetic expression: expecting primary: " "
LDS arch/arm/boot/compressed/vmlinux.lds
AS arch/arm/boot/compressed/head.o
GZIP arch/arm/boot/compressed/piggy_data
AS arch/arm/boot/compressed/piggy.o
CC arch/arm/boot/compressed/misc.o
This occurs since GNU Make commit 98da874c4303 ("[SV 10593] Export
variables to $(shell ...) commands"), and the O= option is needed to
reproduce it. The generated zImage is correct despite the error message.
As the commit description of 98da874c4303 [1] says, exported variables
are passed down to $(shell ) functions, which means exported recursive
variables might be expanded earlier than before, in the parse stage.
The following test code demonstrates the change for GNU Make 4.4.
[Test Makefile]
$(shell echo hello > foo)
export foo = $(shell cat bar/../foo)
$(shell mkdir bar)
all:
@echo $(foo)
[GNU Make 4.3]
$ rm -rf bar; make-4.3
hello
[GNU Make 4.4]
$ rm -rf bar; make-4.4
cat: bar/../foo: No such file or directory
hello
The 'foo' is a resursively expanded (i.e. lazily expanded) variable.
GNU Make 4.3 expands 'foo' just before running the recipe '@echo $(foo)',
at this point, the directory 'bar' exists.
GNU Make 4.4 expands 'foo' to evaluate $(shell mkdir bar) because it is
exported. At this point, the directory 'bar' does not exit yet. The cat
command cannot resolve the bar/../foo path, hence the error message.
Let's get back to the kernel Makefile.
In arch/arm/boot/compressed/Makefile, KBSS_SZ is referenced by
LDFLAGS_vmlinux, which is recursive and also exported by the top
Makefile.
GNU Make 4.3 expands KBSS_SZ just before running the recipes, so no
error message.
GNU Make 4.4 expands KBSS_SZ in the parse stage, where the directory
arm/arm/boot/compressed does not exit yet. When compiled with O=,
the output directory is created by $(shell mkdir -p $(obj-dirs))
in scripts/Makefile.build.
There are two ways to fix this particular issue:
- change "$(obj)/../../../../vmlinux" in KBSS_SZ to "vmlinux"
- unexport LDFLAGS_vmlinux
This commit takes the latter course because it is what I originally
intended.
Commit 3ec8a5b33d ("kbuild: do not export LDFLAGS_vmlinux")
unexported LDFLAGS_vmlinux.
Commit 5d4aeffbf7 ("kbuild: rebuild .vmlinux.export.o when its
prerequisite is updated") accidentally exported it again.
We can clean up arch/arm/boot/compressed/Makefile later.
[1]: https://git.savannah.gnu.org/cgit/make.git/commit/?id=98da874c43035a490cdca81331724f233a3d0c9a
Link: https://lore.kernel.org/all/Y7i8+EjwdnhHtlrr@dev-arch.thelio-3990X/
Fixes: 5d4aeffbf7 ("kbuild: rebuild .vmlinux.export.o when its prerequisite is updated")
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Nathan Chancellor <nathan@kernel.org>
The single *.ko build is broken since commit f65a486821 ("kbuild:
change module.order to list *.o instead of *.ko").
Fixes: f65a486821 ("kbuild: change module.order to list *.o instead of *.ko")
Reported-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Marc Kleine-Budde <mkl@pengutronix.de>
This was previously alphabetically sorted. Sort it again.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
- Support zstd-compressed debug info
- Allow W=1 builds to detect objects shared among multiple modules
- Add srcrpm-pkg target to generate a source RPM package
- Make the -s option detection work for future GNU Make versions
- Add -Werror to KBUILD_CPPFLAGS when CONFIG_WERROR=y
- Allow W=1 builds to detect -Wundef warnings in any preprocessed files
- Raise the minimum supported version of binutils to 2.25
- Use $(intcmp ...) to compare integers if GNU Make >= 4.4 is used
- Use $(file ...) to read a file if GNU Make >= 4.2 is used
- Print error if GNU Make older than 3.82 is used
- Allow modpost to detect section mismatches with Clang LTO
- Include vmlinuz.efi into kernel tarballs for arm64 CONFIG_EFI_ZBOOT=y
-----BEGIN PGP SIGNATURE-----
iQJJBAABCgAzFiEEbmPs18K1szRHjPqEPYsBB53g2wYFAmOeImsVHG1hc2FoaXJv
eUBrZXJuZWwub3JnAAoJED2LAQed4NsG06IP/iVjuWFvnjDZT4X8X6zN8aKp1vtR
EMkmoRtt5cD4CLb1MG4N7irYHgedQSx4rYceP45MyW1I3egl6Ct14RDyeQ1xSIZb
XFTLDCZvfl/up3MdiqNAqKRS7x5lk9++7F0t+2SoQxKQyJvm735XreX+VhZ1FeLB
qcHrmzJ5veky5Ry/3OkNUgKFBjKEAL+qKMc55uvkXqfTb3KoBa2r4VC1OaoYGRru
R8oF9qQRnGVQAl/LbBVchmgSjxryxPrCvBGiKlK03VkXdzEMHMimEJh3BQ6e0PGo
gajdk+4liy7z+jQnI7jFhvJjGKzkEP/Bc99M/uS92QX5MgpH6mqpHMoqqPiqW87K
RmZH37FqRu1Vo8dpibmH6r2K6YD/HHRjaDHk1VuuCQYEn0dsNmokPXOqd/1v0I1i
TXPjWOw1AID5vMJWllqxFhpeVvf0vx5BT/UNrh68MLqlJZzv2eMVJb4fNy6640ml
U0NclMnOa3eOmf5z1T7/LqDRTa63Q0kpanRrBpcmVOaqW+ZpQ3SQjh4uBN1PyJHL
cX3Skc341DyRlFiT54QhGKlm57MEb2gjhBZ3Z4J+b7sEFgvjXH/W8vcOGIKlppmA
CfYMyres4OV+fJc89ONkWsvLiOP1OeUGPvytm33J5QMKXc8SzOLP0D/F8kjrDflm
EROKuZ4EA5ej/rOy
=Ig/Y
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Support zstd-compressed debug info
- Allow W=1 builds to detect objects shared among multiple modules
- Add srcrpm-pkg target to generate a source RPM package
- Make the -s option detection work for future GNU Make versions
- Add -Werror to KBUILD_CPPFLAGS when CONFIG_WERROR=y
- Allow W=1 builds to detect -Wundef warnings in any preprocessed files
- Raise the minimum supported version of binutils to 2.25
- Use $(intcmp ...) to compare integers if GNU Make >= 4.4 is used
- Use $(file ...) to read a file if GNU Make >= 4.2 is used
- Print error if GNU Make older than 3.82 is used
- Allow modpost to detect section mismatches with Clang LTO
- Include vmlinuz.efi into kernel tarballs for arm64 CONFIG_EFI_ZBOOT=y
* tag 'kbuild-v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (29 commits)
buildtar: fix tarballs with EFI_ZBOOT enabled
modpost: Include '.text.*' in TEXT_SECTIONS
padata: Mark padata_work_init() as __ref
kbuild: ensure Make >= 3.82 is used
kbuild: refactor the prerequisites of the modpost rule
kbuild: change module.order to list *.o instead of *.ko
kbuild: use .NOTINTERMEDIATE for future GNU Make versions
kconfig: refactor Makefile to reduce process forks
kbuild: add read-file macro
kbuild: do not sort after reading modules.order
kbuild: add test-{ge,gt,le,lt} macros
Documentation: raise minimum supported version of binutils to 2.25
kbuild: add -Wundef to KBUILD_CPPFLAGS for W=1 builds
kbuild: move -Werror from KBUILD_CFLAGS to KBUILD_CPPFLAGS
kbuild: Port silent mode detection to future gnu make.
init/version.c: remove #include <generated/utsrelease.h>
firmware_loader: remove #include <generated/utsrelease.h>
modpost: Mark uuid_le type to be suitable only for MEI
kbuild: add ability to make source rpm buildable using koji
kbuild: warn objects shared among multiple modules
...
- Add powerpc qspinlock implementation optimised for large system scalability and
paravirt. See the merge message for more details.
- Enable objtool to be built on powerpc to generate mcount locations.
- Use a temporary mm for code patching with the Radix MMU, so the writable mapping is
restricted to the patching CPU.
- Add an option to build the 64-bit big-endian kernel with the ELFv2 ABI.
- Sanitise user registers on interrupt entry on 64-bit Book3S.
- Many other small features and fixes.
Thanks to: Aboorva Devarajan, Angel Iglesias, Benjamin Gray, Bjorn Helgaas, Bo Liu, Chen
Lifu, Christoph Hellwig, Christophe JAILLET, Christophe Leroy, Christopher M. Riedl, Colin
Ian King, Deming Wang, Disha Goel, Dmitry Torokhov, Finn Thain, Geert Uytterhoeven,
Gustavo A. R. Silva, Haowen Bai, Joel Stanley, Jordan Niethe, Julia Lawall, Kajol Jain,
Laurent Dufour, Li zeming, Miaoqian Lin, Michael Jeanson, Nathan Lynch, Naveen N. Rao,
Nayna Jain, Nicholas Miehlbradt, Nicholas Piggin, Pali Rohár, Randy Dunlap, Rohan McLure,
Russell Currey, Sathvika Vasireddy, Shaomin Deng, Stephen Kitt, Stephen Rothwell, Thomas
Weißschuh, Tiezhu Yang, Uwe Kleine-König, Xie Shaowen, Xiu Jianfeng, XueBing Chen, Yang
Yingliang, Zhang Jiaming, ruanjinjie, Jessica Yu, Wolfram Sang.
-----BEGIN PGP SIGNATURE-----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=7k3p
-----END PGP SIGNATURE-----
Merge tag 'powerpc-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Add powerpc qspinlock implementation optimised for large system
scalability and paravirt. See the merge message for more details
- Enable objtool to be built on powerpc to generate mcount locations
- Use a temporary mm for code patching with the Radix MMU, so the
writable mapping is restricted to the patching CPU
- Add an option to build the 64-bit big-endian kernel with the ELFv2
ABI
- Sanitise user registers on interrupt entry on 64-bit Book3S
- Many other small features and fixes
Thanks to Aboorva Devarajan, Angel Iglesias, Benjamin Gray, Bjorn
Helgaas, Bo Liu, Chen Lifu, Christoph Hellwig, Christophe JAILLET,
Christophe Leroy, Christopher M. Riedl, Colin Ian King, Deming Wang,
Disha Goel, Dmitry Torokhov, Finn Thain, Geert Uytterhoeven, Gustavo A.
R. Silva, Haowen Bai, Joel Stanley, Jordan Niethe, Julia Lawall, Kajol
Jain, Laurent Dufour, Li zeming, Miaoqian Lin, Michael Jeanson, Nathan
Lynch, Naveen N. Rao, Nayna Jain, Nicholas Miehlbradt, Nicholas Piggin,
Pali Rohár, Randy Dunlap, Rohan McLure, Russell Currey, Sathvika
Vasireddy, Shaomin Deng, Stephen Kitt, Stephen Rothwell, Thomas
Weißschuh, Tiezhu Yang, Uwe Kleine-König, Xie Shaowen, Xiu Jianfeng,
XueBing Chen, Yang Yingliang, Zhang Jiaming, ruanjinjie, Jessica Yu,
and Wolfram Sang.
* tag 'powerpc-6.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (181 commits)
powerpc/code-patching: Fix oops with DEBUG_VM enabled
powerpc/qspinlock: Fix 32-bit build
powerpc/prom: Fix 32-bit build
powerpc/rtas: mandate RTAS syscall filtering
powerpc/rtas: define pr_fmt and convert printk call sites
powerpc/rtas: clean up includes
powerpc/rtas: clean up rtas_error_log_max initialization
powerpc/pseries/eeh: use correct API for error log size
powerpc/rtas: avoid scheduling in rtas_os_term()
powerpc/rtas: avoid device tree lookups in rtas_os_term()
powerpc/rtasd: use correct OF API for event scan rate
powerpc/rtas: document rtas_call()
powerpc/pseries: unregister VPA when hot unplugging a CPU
powerpc/pseries: reset the RCU watchdogs after a LPM
powerpc: Take in account addition CPU node when building kexec FDT
powerpc: export the CPU node count
powerpc/cpuidle: Set CPUIDLE_FLAG_POLLING for snooze state
powerpc/dts/fsl: Fix pca954x i2c-mux node names
cxl: Remove unnecessary cxl_pci_window_alignment()
selftests/powerpc: Fix resource leaks
...
been long in the making. It is a lighterweight software-only fix for
Skylake-based cores where enabling IBRS is a big hammer and causes a
significant performance impact.
What it basically does is, it aligns all kernel functions to 16 bytes
boundary and adds a 16-byte padding before the function, objtool
collects all functions' locations and when the mitigation gets applied,
it patches a call accounting thunk which is used to track the call depth
of the stack at any time.
When that call depth reaches a magical, microarchitecture-specific value
for the Return Stack Buffer, the code stuffs that RSB and avoids its
underflow which could otherwise lead to the Intel variant of Retbleed.
This software-only solution brings a lot of the lost performance back,
as benchmarks suggest:
https://lore.kernel.org/all/20220915111039.092790446@infradead.org/
That page above also contains a lot more detailed explanation of the
whole mechanism
- Implement a new control flow integrity scheme called FineIBT which is
based on the software kCFI implementation and uses hardware IBT support
where present to annotate and track indirect branches using a hash to
validate them
- Other misc fixes and cleanups
-----BEGIN PGP SIGNATURE-----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=cRy1
-----END PGP SIGNATURE-----
Merge tag 'x86_core_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 core updates from Borislav Petkov:
- Add the call depth tracking mitigation for Retbleed which has been
long in the making. It is a lighterweight software-only fix for
Skylake-based cores where enabling IBRS is a big hammer and causes a
significant performance impact.
What it basically does is, it aligns all kernel functions to 16 bytes
boundary and adds a 16-byte padding before the function, objtool
collects all functions' locations and when the mitigation gets
applied, it patches a call accounting thunk which is used to track
the call depth of the stack at any time.
When that call depth reaches a magical, microarchitecture-specific
value for the Return Stack Buffer, the code stuffs that RSB and
avoids its underflow which could otherwise lead to the Intel variant
of Retbleed.
This software-only solution brings a lot of the lost performance
back, as benchmarks suggest:
https://lore.kernel.org/all/20220915111039.092790446@infradead.org/
That page above also contains a lot more detailed explanation of the
whole mechanism
- Implement a new control flow integrity scheme called FineIBT which is
based on the software kCFI implementation and uses hardware IBT
support where present to annotate and track indirect branches using a
hash to validate them
- Other misc fixes and cleanups
* tag 'x86_core_for_v6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (80 commits)
x86/paravirt: Use common macro for creating simple asm paravirt functions
x86/paravirt: Remove clobber bitmask from .parainstructions
x86/debug: Include percpu.h in debugreg.h to get DECLARE_PER_CPU() et al
x86/cpufeatures: Move X86_FEATURE_CALL_DEPTH from bit 18 to bit 19 of word 11, to leave space for WIP X86_FEATURE_SGX_EDECCSSA bit
x86/Kconfig: Enable kernel IBT by default
x86,pm: Force out-of-line memcpy()
objtool: Fix weak hole vs prefix symbol
objtool: Optimize elf_dirty_reloc_sym()
x86/cfi: Add boot time hash randomization
x86/cfi: Boot time selection of CFI scheme
x86/ibt: Implement FineIBT
objtool: Add --cfi to generate the .cfi_sites section
x86: Add prefix symbols for function padding
objtool: Add option to generate prefix symbols
objtool: Avoid O(bloody terrible) behaviour -- an ode to libelf
objtool: Slice up elf_create_section_symbol()
kallsyms: Revert "Take callthunks into account"
x86: Unconfuse CONFIG_ and X86_FEATURE_ namespaces
x86/retpoline: Fix crash printing warning
x86/paravirt: Fix a !PARAVIRT build warning
...
- Convert flexible array members, fix -Wstringop-overflow warnings,
and fix KCFI function type mismatches that went ignored by
maintainers (Gustavo A. R. Silva, Nathan Chancellor, Kees Cook).
- Remove the remaining side-effect users of ksize() by converting
dma-buf, btrfs, and coredump to using kmalloc_size_roundup(),
add more __alloc_size attributes, and introduce full testing
of all allocator functions. Finally remove the ksize() side-effect
so that each allocation-aware checker can finally behave without
exceptions.
- Introduce oops_limit (default 10,000) and warn_limit (default off)
to provide greater granularity of control for panic_on_oops and
panic_on_warn (Jann Horn, Kees Cook).
- Introduce overflows_type() and castable_to_type() helpers for
cleaner overflow checking.
- Improve code generation for strscpy() and update str*() kern-doc.
- Convert strscpy and sigphash tests to KUnit, and expand memcpy
tests.
- Always use a non-NULL argument for prepare_kernel_cred().
- Disable structleak plugin in FORTIFY KUnit test (Anders Roxell).
- Adjust orphan linker section checking to respect CONFIG_WERROR
(Xin Li).
- Make sure siginfo is cleared for forced SIGKILL (haifeng.xu).
- Fix um vs FORTIFY warnings for always-NULL arguments.
-----BEGIN PGP SIGNATURE-----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=yaaN
-----END PGP SIGNATURE-----
Merge tag 'hardening-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull kernel hardening updates from Kees Cook:
- Convert flexible array members, fix -Wstringop-overflow warnings, and
fix KCFI function type mismatches that went ignored by maintainers
(Gustavo A. R. Silva, Nathan Chancellor, Kees Cook)
- Remove the remaining side-effect users of ksize() by converting
dma-buf, btrfs, and coredump to using kmalloc_size_roundup(), add
more __alloc_size attributes, and introduce full testing of all
allocator functions. Finally remove the ksize() side-effect so that
each allocation-aware checker can finally behave without exceptions
- Introduce oops_limit (default 10,000) and warn_limit (default off) to
provide greater granularity of control for panic_on_oops and
panic_on_warn (Jann Horn, Kees Cook)
- Introduce overflows_type() and castable_to_type() helpers for cleaner
overflow checking
- Improve code generation for strscpy() and update str*() kern-doc
- Convert strscpy and sigphash tests to KUnit, and expand memcpy tests
- Always use a non-NULL argument for prepare_kernel_cred()
- Disable structleak plugin in FORTIFY KUnit test (Anders Roxell)
- Adjust orphan linker section checking to respect CONFIG_WERROR (Xin
Li)
- Make sure siginfo is cleared for forced SIGKILL (haifeng.xu)
- Fix um vs FORTIFY warnings for always-NULL arguments
* tag 'hardening-v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (31 commits)
ksmbd: replace one-element arrays with flexible-array members
hpet: Replace one-element array with flexible-array member
um: virt-pci: Avoid GCC non-NULL warning
signal: Initialize the info in ksignal
lib: fortify_kunit: build without structleak plugin
panic: Expose "warn_count" to sysfs
panic: Introduce warn_limit
panic: Consolidate open-coded panic_on_warn checks
exit: Allow oops_limit to be disabled
exit: Expose "oops_count" to sysfs
exit: Put an upper limit on how often we can oops
panic: Separate sysctl logic from CONFIG_SMP
mm/pgtable: Fix multiple -Wstringop-overflow warnings
mm: Make ksize() a reporting-only function
kunit/fortify: Validate __alloc_size attribute results
drm/sti: Fix return type of sti_{dvo,hda,hdmi}_connector_mode_valid()
drm/fsl-dcu: Fix return type of fsl_dcu_drm_connector_mode_valid()
driver core: Add __alloc_size hint to devm allocators
overflow: Introduce overflows_type() and castable_to_type()
coredump: Proactively round up to kmalloc bucket size
...
Documentation/process/changes.rst notes the minimal GNU Make version,
but it is not checked anywhere.
We could check $(MAKE_VERSION), but another simple way is to check
$(.FEATURES) since the feature list always grows.
GNU Make 3.81 expands $(.FEATURES) to:
target-specific order-only second-expansion else-if archives jobserver check-symlink
GNU Make 3.82 expands $(.FEATURES) to:
target-specific order-only second-expansion else-if shortest-stem undefine archives jobserver check-symlink
To ensure Make >= 3.82, you can check either 'shortest-stem' or
'undefine'.
This way is not always possible. For example, Make 4.0 through 4.2 have
the same set of $(.FEATURES). At that point, we will need to come up
with a different approach.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
scripts/Makefile.build replaces the suffix .o with .ko, then
scripts/Makefile.modpost calls the sed command to change .ko back
to the original .o suffix.
Instead of converting the suffixes back-and-forth, store the .o paths
in modules.order, and replace it with .ko in 'make modules_install'.
This avoids the unneeded sed command.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Since GNU Make 4.2, $(file ...) supports the read operater '<', which
is useful to read a file without forking a new process. No warning is
shown even if the input file is missing.
For older Make versions, it falls back to the cat command.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Tested-by: Alexander Lobakin <alexandr.lobakin@intel.com>
GNU Make 4.4 introduced $(intcmp ...), which is useful to compare two
integers without forking a new process.
Add test-{ge,gt,le,lt} macros, which work more efficiently with GNU
Make >= 4.4. For older Make versions, they fall back to the 'test'
shell command.
The first two parameters to $(intcmp ...) must not be empty. To avoid
the syntax error, I appended '0' to them. Fortunately, '00' is treated
as '0'. This is needed because CONFIG options may expand to an empty
string when the kernel configuration is not included.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com> # RISC-V
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
- The beginnings of a set of translations into Spanish, headed up by Carlos
Bilbao.
- More Chinese translations.
- A change to the Sphinx "alabaster" theme by default for HTML generation.
Unlike the previous default (Read the Docs), alabaster is shipped with
Sphinx by default, reducing the number of other dependencies that need to
be installed. It also (IMO) produces a cleaner and more readable result.
- The ability to render the documentation into the texinfo format
(something Sphinx could always do, we just never wired it up until now).
Plus the usual collection of typo fixes, build-warning fixes, and minor
updates.
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmOW8rQACgkQF0NaE2wM
flhMPQf+IlaaSPmjjAM68RPW465KP1s7MxeAMz8RmQ+qNqHPlWznTnIOvH2NLNtA
U4pcokeGunVEAsLdHCEE/VCUk76p8pWpEle4bKpbS0Qgl83IcLKnPLm8vWFc2Nv9
VdjntswlsMEIFRjD+4MJcPYcoi9ZtuU0fD/7rpyfU/hmJCBlPvyxb+BXPK5sf6a6
25Zex1UipNB+ieR7UD6Vf2ZhdUS0A0qzEQPaCTfCKzHmjEIVqq6G/+qnxAp3aSf2
at+Sz//3Ny86PO0qlmyeh656L1STMWjMjek6/Z6yKTWInxaeAo39cn8n//Sdpzfy
mC7SMEwX7JtYKqgxZYfLDhU4txByKA==
=0zgk
-----END PGP SIGNATURE-----
Merge tag 'docs-6.2' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet:
"This was a not-too-busy cycle for documentation; highlights include:
- The beginnings of a set of translations into Spanish, headed up by
Carlos Bilbao
- More Chinese translations
- A change to the Sphinx "alabaster" theme by default for HTML
generation.
Unlike the previous default (Read the Docs), alabaster is shipped
with Sphinx by default, reducing the number of other dependencies
that need to be installed. It also (IMO) produces a cleaner and
more readable result.
- The ability to render the documentation into the texinfo format
(something Sphinx could always do, we just never wired it up until
now)
Plus the usual collection of typo fixes, build-warning fixes, and
minor updates"
* tag 'docs-6.2' of git://git.lwn.net/linux: (67 commits)
Documentation/features: Use loongarch instead of loong
Documentation/features-refresh.sh: Only sed the beginning "arch" of ARCH_DIR
docs/zh_CN: Fix '.. only::' directive's expression
docs/sp_SP: Add memory-barriers.txt Spanish translation
docs/zh_CN/LoongArch: Update links of LoongArch ISA Vol1 and ELF psABI
docs/LoongArch: Update links of LoongArch ISA Vol1 and ELF psABI
Documentation/features: Update feature lists for 6.1
Documentation: Fixed a typo in bootconfig.rst
docs/sp_SP: Add process coding-style translation
docs/sp_SP: Add kernel-docs.rst Spanish translation
docs: Create translations/sp_SP/process/, move submitting-patches.rst
docs: Add book to process/kernel-docs.rst
docs: Retire old resources from kernel-docs.rst
docs: Update maintainer of kernel-docs.rst
Documentation: riscv: Document the sv57 VM layout
Documentation: USB: correct possessive "its" usage
math64: fix kernel-doc return value warnings
math64: add kernel-doc for DIV64_U64_ROUND_UP
math64: favor kernel-doc from header files
doc: add texinfodocs and infodocs targets
...
The devicetree changes contain exactly 1000 non-merge changesets,
including a number of new arm64 SoC variants from Qualcomm and Apple,
as well as the Renesas r9a07g043f/u chip in both arm64 and riscv variants
While we have occasionally merged support for non-arm SoCs in the past,
this is now the normal path for riscv devicetree files.
The most notable changes, by SoC platform, are:
- The Apple T6000 (M1 Pro), T6001 (M1 Max) and T6002 (M2 Ultra)
chips now have initial support. This is particularly nice as I am
typing this on a T6002 Mac Studio with only a small number of driver
patches.
- Qualcomm MSM8996 Pro (Snapdragon 821), SM6115 (Snapdragon 662), SM4250
(Snapdragon 460), SM6375 (Snapdragon 695), SDM670 (Snapdragon 670),
MSM8976 (Snapdragon 652) and MSM8956 (Snapdragon 650) are all mobile
phone chips that are closely related to others we already support.
Adding those helps support more phones and we add several models
from Sony (Xperia 10 IV, 5 IV, X, and X compact), OnePlus (One, 3,
3T, and Nord N100), Xiaomi (Poco F1, Mi6), Huawei (Watch) and Google
(Pixel 3a). There are also new variants of the Herobrine and Trogdor
chromebook motherboards. SA8540P is an automotive SoC used in the
Qdrive-3 development platform
- Rockchips gains no new SoC variants, but a lot of new boards:
three mobile gaming systems based on RK3326 Odroid-Go/rg351 family,
two more Anbernic gaming systems based on RK3566 and a number of
other RK356x based single-board computers.
- Renesas RZ/G2UL (r9a07g043) was already supported for arm64, but as
the newly added RZ/Five is based on the same design, this now gets
reorganized in order to share most of the dts description between
the two and add the RZ/Five SMARC EVK board support.
Aside from that, there are the usual changes all over the tree:
- New boards on other platforms contain two ASpeed BMC users, two
Broadcom based Wifi routers, Zyxel NSA310S NAS, the i.MX6 based Kobo
Aura2 ebook reader, two i.MX8 based development boards, two Uniphier
Pro5 development boards, the STM32MP1 testbench board from DHCOR,
the TI K3 based BeagleBone AI-64 board, and the Mediatek Helio X10
based Sony Xperia M5 phone.
- The Starfive JH7100 source gets reorganized in order to support the
VisionFive V1 board.
- Minor updates and cleanups for Intel SoCFPGA, Marvell PXA168,
TI, ST, NXP, Apple, Broadcom, Juno, Marvell MVEBU, at91, nuvoton,
Tegra, Mediatek, Renesas, Hisilicon, Allwinner, Samsung, ux500,
spear, ... The treewide cleanups now have a lot of fixes for cache
nodes and other binding violoations.
- Somewhat larger sets of reworks for NVIDIA Tegra, Qualcomm
and Renesas platforms, adding a lot more on-chip device support
- A rework of the way that DTB overlays are built.
-----BEGIN PGP SIGNATURE-----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=WCFd
-----END PGP SIGNATURE-----
Merge tag 'soc-dt-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC DT updates from Arnd Bergmann:
"The devicetree changes contain exactly 1000 non-merge changesets,
including a number of new arm64 SoC variants from Qualcomm and Apple,
as well as the Renesas r9a07g043f/u chip in both arm64 and riscv
variants.
While we have occasionally merged support for non-arm SoCs in the
past, this is now the normal path for riscv devicetree files.
The most notable changes, by SoC platform, are:
- The Apple T6000 (M1 Pro), T6001 (M1 Max) and T6002 (M1 Ultra) chips
now have initial support. This is particularly nice as I am typing
this on a T6002 Mac Studio with only a small number of driver
patches.
- Qualcomm MSM8996 Pro (Snapdragon 821), SM6115 (Snapdragon 662),
SM4250 (Snapdragon 460), SM6375 (Snapdragon 695), SDM670
(Snapdragon 670), MSM8976 (Snapdragon 652) and MSM8956 (Snapdragon
650) are all mobile phone chips that are closely related to others
we already support.
Adding those helps support more phones and we add several models
from Sony (Xperia 10 IV, 5 IV, X, and X compact), OnePlus (One, 3,
3T, and Nord N100), Xiaomi (Poco F1, Mi6), Huawei (Watch) and
Google (Pixel 3a).
There are also new variants of the Herobrine and Trogdor chromebook
motherboards. SA8540P is an automotive SoC used in the Qdrive-3
development platform
- Rockchips gains no new SoC variants, but a lot of new boards: three
mobile gaming systems based on RK3326 Odroid-Go/rg351 family, two
more Anbernic gaming systems based on RK3566 and a number of other
RK356x based single-board computers.
- Renesas RZ/G2UL (r9a07g043) was already supported for arm64, but as
the newly added RZ/Five is based on the same design, this now gets
reorganized in order to share most of the dts description between
the two and add the RZ/Five SMARC EVK board support.
Aside from that, there are the usual changes all over the tree:
- New boards on other platforms contain two ASpeed BMC users, two
Broadcom based Wifi routers, Zyxel NSA310S NAS, the i.MX6 based
Kobo Aura2 ebook reader, two i.MX8 based development boards, two
Uniphier Pro5 development boards, the STM32MP1 testbench board from
DHCOR, the TI K3 based BeagleBone AI-64 board, and the Mediatek
Helio X10 based Sony Xperia M5 phone.
- The Starfive JH7100 source gets reorganized in order to support the
VisionFive V1 board.
- Minor updates and cleanups for Intel SoCFPGA, Marvell PXA168, TI,
ST, NXP, Apple, Broadcom, Juno, Marvell MVEBU, at91, nuvoton,
Tegra, Mediatek, Renesas, Hisilicon, Allwinner, Samsung, ux500,
spear, ... The treewide cleanups now have a lot of fixes for cache
nodes and other binding violoations.
- Somewhat larger sets of reworks for NVIDIA Tegra, Qualcomm and
Renesas platforms, adding a lot more on-chip device support
- A rework of the way that DTB overlays are built"
* tag 'soc-dt-6.2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (979 commits)
arm64: dts: apple: t6002: Fix GPU power domains
arm64: dts: apple: t600x-pmgr: Fix search & replace typo
arm64: dts: apple: Add t8103 L1/L2 cache properties and nodes
arm64: dts: apple: Rename dart-sio* to sio-dart*
arch: arm64: apple: t600x: Use standard "iommu" node name
arch: arm64: apple: t8103: Use standard "iommu" node name
ARM: dts: socfpga: Fix pca9548 i2c-mux node name
dt-bindings: iio: adc: qcom,spmi-vadc: fix PM8350 define
dt-bindings: iio: adc: qcom,spmi-vadc: extend example
arm64: dts: qcom: sc8280xp: fix UFS DMA coherency
arm64: dts: qcom: sc7280: Add DT for sc7280-herobrine-zombie
arm64: dts: qcom: sm8250-sony-xperia-edo: fix no-mmc property for SDHCI
arm64: dts: qcom: sdm845-sony-xperia-tama: fix no-mmc property for SDHCI
arm64: dts: qcom: sda660-inforce-ifc6560: fix no-mmc property for SDHCI
arm64: dts: qcom: sa8155p-adp: fix no-mmc property for SDHCI
arm64: dts: qcom: qrb5165-rb: fix no-mmc property for SDHCI
arm64: dts: qcom: sm8450: align MMC node names with dtschema
arm64: dts: qcom: sc7180-trogdor: use generic node names
arm64: dts: qcom: sm8450-hdk: add sound support
arm64: dts: qcom: sm8450: add Soundwire and LPASS
...
ACPI:
* Enable FPDT support for boot-time profiling
* Fix CPU PMU probing to work better with PREEMPT_RT
* Update SMMUv3 MSI DeviceID parsing to latest IORT spec
* APMT support for probing Arm CoreSight PMU devices
CPU features:
* Advertise new SVE instructions (v2.1)
* Advertise range prefetch instruction
* Advertise CSSC ("Common Short Sequence Compression") scalar
instructions, adding things like min, max, abs, popcount
* Enable DIT (Data Independent Timing) when running in the kernel
* More conversion of system register fields over to the generated
header
CPU misfeatures:
* Workaround for Cortex-A715 erratum #2645198
Dynamic SCS:
* Support for dynamic shadow call stacks to allow switching at
runtime between Clang's SCS implementation and the CPU's
pointer authentication feature when it is supported (complete
with scary DWARF parser!)
Tracing and debug:
* Remove static ftrace in favour of, err, dynamic ftrace!
* Seperate 'struct ftrace_regs' from 'struct pt_regs' in core
ftrace and existing arch code
* Introduce and implement FTRACE_WITH_ARGS on arm64 to replace
the old FTRACE_WITH_REGS
* Extend 'crashkernel=' parameter with default value and fallback
to placement above 4G physical if initial (low) allocation
fails
SVE:
* Optimisation to avoid disabling SVE unconditionally on syscall
entry and just zeroing the non-shared state on return instead
Exceptions:
* Rework of undefined instruction handling to avoid serialisation
on global lock (this includes emulation of user accesses to the
ID registers)
Perf and PMU:
* Support for TLP filters in Hisilicon's PCIe PMU device
* Support for the DDR PMU present in Amlogic Meson G12 SoCs
* Support for the terribly-named "CoreSight PMU" architecture
from Arm (and Nvidia's implementation of said architecture)
Misc:
* Tighten up our boot protocol for systems with memory above
52 bits physical
* Const-ify static keys to satisty jump label asm constraints
* Trivial FFA driver cleanups in preparation for v1.1 support
* Export the kernel_neon_* APIs as GPL symbols
* Harden our instruction generation routines against
instrumentation
* A bunch of robustness improvements to our arch-specific selftests
* Minor cleanups and fixes all over (kbuild, kprobes, kfence, PMU, ...)
-----BEGIN PGP SIGNATURE-----
iQFEBAABCgAuFiEEPxTL6PPUbjXGY88ct6xw3ITBYzQFAmOPLFAQHHdpbGxAa2Vy
bmVsLm9yZwAKCRC3rHDchMFjNPRcCACLyDTvkimiqfoPxzzgdkx/6QOvw9s3/mXg
UcTORSZBR1VnYkiMYEKVz/tTfG99dnWtD8/0k/rz48NbhBfsF2sN4ukyBBXVf0zR
fjnaVyVC11LUgBgZKPo6maV+jf/JWf9hJtpPl06KTiPb2Hw2JX4DXg+PeF8t2hGx
NLH4ekQOrlDM8mlsN5mc0YsHbiuO7Xe/NRuet8TsgU4bEvLAwO6bzOLVUMqDQZNq
bQe2ENcGVAzAf7iRJb38lj9qB/5hrQTHRXqLXMSnJyyVjQEwYca0PeJMa7x30bXF
ZZ+xQ8Wq0mxiffZraf6SE34yD4gaYS4Fziw7rqvydC15vYhzJBH1
=hV+2
-----END PGP SIGNATURE-----
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon:
"The highlights this time are support for dynamically enabling and
disabling Clang's Shadow Call Stack at boot and a long-awaited
optimisation to the way in which we handle the SVE register state on
system call entry to avoid taking unnecessary traps from userspace.
Summary:
ACPI:
- Enable FPDT support for boot-time profiling
- Fix CPU PMU probing to work better with PREEMPT_RT
- Update SMMUv3 MSI DeviceID parsing to latest IORT spec
- APMT support for probing Arm CoreSight PMU devices
CPU features:
- Advertise new SVE instructions (v2.1)
- Advertise range prefetch instruction
- Advertise CSSC ("Common Short Sequence Compression") scalar
instructions, adding things like min, max, abs, popcount
- Enable DIT (Data Independent Timing) when running in the kernel
- More conversion of system register fields over to the generated
header
CPU misfeatures:
- Workaround for Cortex-A715 erratum #2645198
Dynamic SCS:
- Support for dynamic shadow call stacks to allow switching at
runtime between Clang's SCS implementation and the CPU's pointer
authentication feature when it is supported (complete with scary
DWARF parser!)
Tracing and debug:
- Remove static ftrace in favour of, err, dynamic ftrace!
- Seperate 'struct ftrace_regs' from 'struct pt_regs' in core ftrace
and existing arch code
- Introduce and implement FTRACE_WITH_ARGS on arm64 to replace the
old FTRACE_WITH_REGS
- Extend 'crashkernel=' parameter with default value and fallback to
placement above 4G physical if initial (low) allocation fails
SVE:
- Optimisation to avoid disabling SVE unconditionally on syscall
entry and just zeroing the non-shared state on return instead
Exceptions:
- Rework of undefined instruction handling to avoid serialisation on
global lock (this includes emulation of user accesses to the ID
registers)
Perf and PMU:
- Support for TLP filters in Hisilicon's PCIe PMU device
- Support for the DDR PMU present in Amlogic Meson G12 SoCs
- Support for the terribly-named "CoreSight PMU" architecture from
Arm (and Nvidia's implementation of said architecture)
Misc:
- Tighten up our boot protocol for systems with memory above 52 bits
physical
- Const-ify static keys to satisty jump label asm constraints
- Trivial FFA driver cleanups in preparation for v1.1 support
- Export the kernel_neon_* APIs as GPL symbols
- Harden our instruction generation routines against instrumentation
- A bunch of robustness improvements to our arch-specific selftests
- Minor cleanups and fixes all over (kbuild, kprobes, kfence, PMU, ...)"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (151 commits)
arm64: kprobes: Return DBG_HOOK_ERROR if kprobes can not handle a BRK
arm64: kprobes: Let arch do_page_fault() fix up page fault in user handler
arm64: Prohibit instrumentation on arch_stack_walk()
arm64:uprobe fix the uprobe SWBP_INSN in big-endian
arm64: alternatives: add __init/__initconst to some functions/variables
arm_pmu: Drop redundant armpmu->map_event() in armpmu_event_init()
kselftest/arm64: Allow epoll_wait() to return more than one result
kselftest/arm64: Don't drain output while spawning children
kselftest/arm64: Hold fp-stress children until they're all spawned
arm64/sysreg: Remove duplicate definitions from asm/sysreg.h
arm64/sysreg: Convert ID_DFR1_EL1 to automatic generation
arm64/sysreg: Convert ID_DFR0_EL1 to automatic generation
arm64/sysreg: Convert ID_AFR0_EL1 to automatic generation
arm64/sysreg: Convert ID_MMFR5_EL1 to automatic generation
arm64/sysreg: Convert MVFR2_EL1 to automatic generation
arm64/sysreg: Convert MVFR1_EL1 to automatic generation
arm64/sysreg: Convert MVFR0_EL1 to automatic generation
arm64/sysreg: Convert ID_PFR2_EL1 to automatic generation
arm64/sysreg: Convert ID_PFR1_EL1 to automatic generation
arm64/sysreg: Convert ID_PFR0_EL1 to automatic generation
...
-----BEGIN PGP SIGNATURE-----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=CxjR
-----END PGP SIGNATURE-----
Merge tag 'unsigned-char-6.2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/linux
Pull unsigned-char conversion from Jason Donenfeld:
"Enable -funsigned-char and fix code affected by that flag.
During the 6.1 cycle, several patches already made it into the tree,
which were for code that was already broken on at least one
architecture, where the naked char had a different sign than the code
author anticipated, or were part of some bug fix for an existing bug
that this initiative unearthed.
These 6.1-era fixes are:
648060902a ("MIPS: pic32: treat port as signed integer")
5c26159c97 ("ipvs: use explicitly signed chars")
e6cb876945 ("wifi: airo: do not assign -1 to unsigned char")
937ec9f7d5 ("staging: rtl8192e: remove bogus ssid character sign test")
6770473832 ("misc: sgi-gru: use explicitly signed char")
50895a55bc ("ALSA: rme9652: use explicitly signed char")
ee03c0f200 ("ALSA: au88x0: use explicitly signed char")
835bed1b83 ("fbdev: sisfb: use explicitly signed char")
50f19697dd ("parisc: Use signed char for hardware path in pdc.h")
66063033f7 ("wifi: rt2x00: use explicitly signed or unsigned types")
Regarding patches in this pull:
- There is one patch in this pull that should have made it to you
during 6.1 ("media: stv0288: use explicitly signed char"), but the
maintainer was MIA during the cycle, so it's in here instead.
- Two patches fix single architecture code affected by unsigned char
("perf/x86: Make struct p4_event_bind::cntr signed array" and
"sparc: sbus: treat CPU index as integer"), while one patch fixes
an unused typedef, in case it's ever used in the future ("media:
atomisp: make hive_int8 explictly signed").
- Finally, there's the change to actually enable -funsigned-char
("kbuild: treat char as always unsigned") and then the removal of
some no longer useful !__CHAR_UNSIGNED__ selftest code ("lib:
assume char is unsigned").
The various fixes were found with a combination of diffing objdump
output, a large variety of Coccinelle scripts, and plain old grep. In
the end, things didn't seem as bad as I feared they would. But of
course, it's also possible I missed things.
However, this has been in linux-next for basically an entire cycle
now, so I'm not overly worried. I've also been daily driving this on
my laptop for all of 6.1. Still, this series, and the ones sent for
6.1 don't total in quantity to what I thought it'd be, so I will be on
the lookout for breakage.
We could receive a few reports that are quickly fixable. Hopefully we
won't receive a barrage of reports that would result in a revert. And
just maybe we won't receive any reports at all and nobody will even
notice. Knock on wood"
* tag 'unsigned-char-6.2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/zx2c4/linux:
lib: assume char is unsigned
kbuild: treat char as always unsigned
media: atomisp: make hive_int8 explictly signed
media: stv0288: use explicitly signed char
sparc: sbus: treat CPU index as integer
perf/x86: Make struct p4_event_bind::cntr signed array
CONFIG_WERROR turns warnings into errors, which happens only for *.c
files because -Werror is added to KBUILD_CFLAGS.
Adding it to KBUILD_CPPFLAGS makes more sense because preprocessors
understand the -Werror option.
For example, you can put a #warning directive in any preprocessed code.
warning: #warning "this is a warning message" [-Wcpp]
If -Werror is added, it is promoted to an error.
error: #warning "this is a warning message" [-Werror=cpp]
This commit moves -Werror to KBUILD_CPPFLAGS so it works in the same way
for *.c, *.S, *.lds.S or whatever needs preprocessing.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Port silent mode detection to the future (post make-4.4) versions of gnu make.
Makefile contains the following piece of make code to detect if option -s is
specified on the command line.
ifneq ($(findstring s,$(filter-out --%,$(MAKEFLAGS))),)
This code is executed by make at parse time and assumes that MAKEFLAGS
does not contain command line variable definitions.
Currently if the user defines a=s on the command line, then at build only
time MAKEFLAGS contains " -- a=s".
However, starting with commit dc2d963989b96161472b2cd38cef5d1f4851ea34
MAKEFLAGS contains command line definitions at both parse time and
build time.
This '-s' detection code then confuses a command line variable
definition which contains letter 's' with option -s.
$ # old make
$ make net/wireless/ocb.o a=s
CALL scripts/checksyscalls.sh
DESCEND objtool
$ # this a new make which defines makeflags at parse time
$ ~/src/gmake/make/l64/make net/wireless/ocb.o a=s
$
We can see here that the letter 's' from 'a=s' was confused with -s.
This patch checks for presence of -s using a method recommended by the
make manual here
https://www.gnu.org/software/make/manual/make.html#Testing-Flags.
Link: https://lists.gnu.org/archive/html/bug-make/2022-11/msg00190.html
Reported-by: Jan Palus <jpalus+gnu@fastmail.com>
Signed-off-by: Dmitry Goncharov <dgoncharov@users.sf.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
-----BEGIN PGP SIGNATURE-----
iQFSBAABCAA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmN6wAgeHHRvcnZhbGRz
QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiG0EYH/3/RO90NbrFItraN
Lzr+d3VdbGjTu8xd1M+PRTmwh3zxLpB+Jwqr0T0A2gzL9B/D+AUPUJdrCVbv9DqS
FLJAVqoeV20dNBAHSffOOLPsgCZ+Eu+LzlNN7Iqde0e8cyZICFMNktitui84Xm/i
1NgFVgz9OZ6+aieYvUj3FrFq0p8GTIaC/oybDZrxYKcO8ZzKVMJ11swRw10wwq0g
qOOECvV3w7wlQ8upQZkzFxItKFc7EexZI6R4elXeGSJJ9Hlc092dv/zsKB9dwV+k
WcwkJrZRoezYXzgGBFxUcQtzi+ethjrPjuJuM1rYLUSIcfIW/0lkaSLgRoBu8D+I
1GfXkXs=
=gt6P
-----END PGP SIGNATURE-----
Merge tag 'v6.1-rc6' into x86/core, to resolve conflicts
Resolve conflicts between these commits in arch/x86/kernel/asm-offsets.c:
# upstream:
debc5a1ec0 ("KVM: x86: use a separate asm-offsets.c file")
# retbleed work in x86/core:
5d8213864a ("x86/retbleed: Add SKL return thunk")
... and these commits in include/linux/bpf.h:
# upstram:
18acb7fac2 ("bpf: Revert ("Fix dispatcher patchable function entry to 5 bytes nop")")
# x86/core commits:
931ab63664 ("x86/ibt: Implement FineIBT")
bea75b3389 ("x86/Kconfig: Introduce function padding")
The latter two modify BPF_DISPATCHER_ATTRIBUTES(), which was removed upstream.
Conflicts:
arch/x86/kernel/asm-offsets.c
include/linux/bpf.h
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Sphinx supports generating Texinfo sources and Info documentation,
which can be navigated easily and is convenient to search (via the
indexed nodes or anchors, for example).
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Link: https://lore.kernel.org/r/20221116190210.28407-2-maxim.cournoyer@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* 'dt/dtbo-rename' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
kbuild: Cleanup DT Overlay intermediate files as appropriate
staging: pi433: overlay: Rename overlay source file from .dts to .dtso
of: overlay: rename overlay source files from .dts to .dtso
kbuild: Allow DTB overlays to built into .dtbo.S files
kbuild: Allow DTB overlays to built from .dtso named source files
Link: https://lore.kernel.org/r/20221118211103.GA1334449-robh@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Recently, some compile-time checking I added to the clamp_t family of
functions triggered a build error when a poorly written driver was
compiled on ARM, because the driver assumed that the naked `char` type
is signed, but ARM treats it as unsigned, and the C standard says it's
architecture-dependent.
I doubt this particular driver is the only instance in which
unsuspecting authors make assumptions about `char` with no `signed` or
`unsigned` specifier. We were lucky enough this time that that driver
used `clamp_t(char, negative_value, positive_value)`, so the new
checking code found it, and I've sent a patch to fix it, but there are
likely other places lurking that won't be so easily unearthed.
So let's just eliminate this particular variety of heisensign bugs
entirely. Set `-funsigned-char` globally, so that gcc makes the type
unsigned on all architectures.
This will break things in some places and fix things in others, so this
will likely cause a bit of churn while reconciling the type misuse.
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/lkml/202210190108.ESC3pc3D-lkp@intel.com/
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
%.dtbo.o and %.dtbo.S files are used to build-in DT Overlay. They should
should not be removed by Make or the kernel will be needlessly rebuilt.
These should be removed by "clean" and ignored by git like other
intermediate files.
Reported-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Andrew Davis <afd@ti.com>
Fixes: 941214a512 ("kbuild: Allow DTB overlays to built into .dtbo.S files")
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20221114205939.27994-1-afd@ti.com
Signed-off-by: Rob Herring <robh@kernel.org>
Some architectures (powerpc) may not support ftrace locations being nop'ed
out at build time. Introduce CONFIG_HAVE_OBJTOOL_NOP_MCOUNT for objtool, as
a means for architectures to enable nop'ing of ftrace locations. Add --mnop
as an option to objtool --mcount, to indicate support for the same.
Also, make sure that --mnop can be passed as an option to objtool only when
--mcount is passed.
Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Sathvika Vasireddy <sv@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221114175754.1131267-12-sv@linux.ibm.com
In order to allow arches to use code patching to conditionally emit the
shadow stack pushes and pops, rather than always taking the performance
hit even on CPUs that implement alternatives such as stack pointer
authentication on arm64, add a Kconfig symbol that can be set by the
arch to omit the SCS codegen itself, without otherwise affecting how
support code for SCS and compiler options (for register reservation, for
instance) are emitted.
Also, add a static key and some plumbing to omit the allocation of
shadow call stack for dynamic SCS configurations if SCS is disabled at
runtime.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Link: https://lore.kernel.org/r/20221027155908.1940624-3-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
- Use POSIX-compatible grep option.
- Document git-related tips for reproducible builds.
- Fix a typo in the modpost rule.
- Suppress SIGPIPE error message from gcc-ar and llvm-ar.
- Fix segmentation fault in the menuconfig search.
-----BEGIN PGP SIGNATURE-----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=1MFY
-----END PGP SIGNATURE-----
Merge tag 'kbuild-fixes-v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Use POSIX-compatible grep options
- Document git-related tips for reproducible builds
- Fix a typo in the modpost rule
- Suppress SIGPIPE error message from gcc-ar and llvm-ar
- Fix segmentation fault in the menuconfig search
* tag 'kbuild-fixes-v6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kconfig: fix segmentation fault in menuconfig search
kbuild: fix SIGPIPE error message for AR=gcc-ar and AR=llvm-ar
kbuild: fix typo in modpost
Documentation: kbuild: Add description of git for reproducible builds
kbuild: use POSIX-compatible grep option
Andrew Cooper suggested upgrading the orphan section warning to a hard link
error. However Nathan Chancellor said outright turning the warning into an
error with no escape hatch might be too aggressive, as we have had these
warnings triggered by new compiler generated sections, and suggested turning
orphan sections into an error only if CONFIG_WERROR is set. Kees Cook echoed
and emphasized that the mandate from Linus is that we should avoid breaking
builds. It wrecks bisection, it causes problems across compiler versions, etc.
Thus upgrade the orphan section warning to a hard link error only if
CONFIG_WERROR is set.
Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Suggested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Xin Li <xin3.li@intel.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221025073023.16137-2-xin3.li@intel.com
Jiri Slaby reported that building the kernel with AR=gcc-ar shows:
/usr/bin/ar terminated with signal 13 [Broken pipe]
Nathan Chancellor reported the latest AR=llvm-ar shows:
error: write on a pipe with no reader
The latter occurs since LLVM commit 51b557adc131 ("Add an error message
to the default SIGPIPE handler").
The resulting vmlinux is correct, but it is better to silence it.
'head -n1' exits after reading the first line, so the pipe is closed.
Use 'sed -n 1p' to eat the stream till the end.
Fixes: 3216484550 ("kbuild: use obj-y instead extra-y for objects placed at the head")
Link: https://github.com/ClangBuiltLinux/linux/issues/1651
Reported-by: Jiri Slaby <jirislaby@kernel.org>
Reported-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Generic function-alignment infrastructure.
Architectures can select FUNCTION_ALIGNMENT_xxB symbols; the
FUNCTION_ALIGNMENT symbol is then set to the largest such selected
size, 0 otherwise.
From this the -falign-functions compiler argument and __ALIGN macro
are set.
This incorporates the DEBUG_FORCE_FUNCTION_ALIGN_64B knob and future
alignment requirements for x86_64 (later in this series) into a single
place.
NOTE: also removes the 0x90 filler byte from the generic __ALIGN
primitive, that value makes no sense outside of x86.
NOTE: .balign 0 reverts to a no-op.
Requested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220915111143.719248727@infradead.org
- Fix CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y compile error for
the combination of Clang >= 14 and GAS <= 2.35.
- Drop vmlinux.bz2 from the rpm package as it just annoyingly increased
the package size.
- Fix modpost error under build environments using musl.
- Make *.ll files keep value names for easier debugging
- Fix single directory build
- Prevent RISC-V from selecting the broken DWARF5 support when Clang
and GAS are used together.
-----BEGIN PGP SIGNATURE-----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=EZAr
-----END PGP SIGNATURE-----
Merge tag 'kbuild-fixes-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Fix CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y compile error for the
combination of Clang >= 14 and GAS <= 2.35.
- Drop vmlinux.bz2 from the rpm package as it just annoyingly increased
the package size.
- Fix modpost error under build environments using musl.
- Make *.ll files keep value names for easier debugging
- Fix single directory build
- Prevent RISC-V from selecting the broken DWARF5 support when Clang
and GAS are used together.
* tag 'kbuild-fixes-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
lib/Kconfig.debug: Add check for non-constant .{s,u}leb128 support to DWARF5
kbuild: fix single directory build
kbuild: add -fno-discard-value-names to cmd_cc_ll_c
scripts/clang-tools: Convert clang-tidy args to list
modpost: put modpost options before argument
kbuild: Stop including vmlinux.bz2 in the rpm's
Kconfig.debug: add toolchain checks for DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
Kconfig.debug: simplify the dependency of DEBUG_INFO_DWARF4/5
