Commit Graph

5981 Commits

Author SHA1 Message Date
Borislav Petkov
d72e720a19 scripts/decodecode: add the capability to supply the program counter
So that comparing with objdump output from vmlinux can ease pinpointing
where the trapping instruction actually is.  An example is better than a
thousand words:

  $ PC=0xffffffff8329a927 ./scripts/decodecode < ~/tmp/syz/gfs2.splat
  [ 477.379104][T23917] Code: 48 83 ec 28 48 89 3c 24 48 89 54 24 08 e8 c1 b4 4a fe 48 8d bb 00 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 97 05 00 00 48 8b 9b 00 01 00 00 48 85 db 0f 84
  All code
  ========
  ffffffff8329a8fd:       48 83 ec 28             sub    $0x28,%rsp
  ffffffff8329a901:       48 89 3c 24             mov    %rdi,(%rsp)
  ffffffff8329a905:       48 89 54 24 08          mov    %rdx,0x8(%rsp)
  ffffffff8329a90a:       e8 c1 b4 4a fe          callq  0xffffffff81745dd0
  ffffffff8329a90f:       48 8d bb 00 01 00 00    lea    0x100(%rbx),%rdi
  ffffffff8329a916:       48 b8 00 00 00 00 00    movabs $0xdffffc0000000000,%rax
  ffffffff8329a91d:       fc ff df
  ffffffff8329a920:       48 89 fa                mov    %rdi,%rdx
  ffffffff8329a923:       48 c1 ea 03             shr    $0x3,%rdx
  ffffffff8329a927:*      80 3c 02 00             cmpb   $0x0,(%rdx,%rax,1)               <-- trapping instruction
  ffffffff8329a92b:       0f 85 97 05 00 00       jne    0xffffffff8329aec8
  ffffffff8329a931:       48 8b 9b 00 01 00 00    mov    0x100(%rbx),%rbx
  ffffffff8329a938:       48 85 db                test   %rbx,%rbx
  ffffffff8329a93b:       0f                      .byte 0xf
  ffffffff8329a93c:       84                      .byte 0x84

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Marc Zyngier <maz@misterjones.org>
Cc: Will Deacon <will@kernel.org>
Cc: Rabin Vincent <rabin@rab.in>
Link: https://lkml.kernel.org/r/20200930111416.GF6810@zn.tnic
Link: https://lkml.kernel.org/r/20200929113238.GC21110@zn.tnic
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-13 18:38:26 -07:00
Naoki Hayama
33c5bb375e scripts/spelling.txt: add "arbitrary" typo
Add "abitrary||arbitrary".

Signed-off-by: Naoki Hayama <naoki.hayama@lineo.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
Link: https://lkml.kernel.org/r/6bf6520d-787d-5749-09b5-ff92185f501f@lineo.co.jp
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-13 18:38:26 -07:00
Wang Qing
2c92406f33 scripts/spelling.txt: increase error-prone spell checking
Increase direcly,ununsed,manger spelling error check

Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Wang Qing <wangqing@vivo.com>
Cc: Xiong <xndchn@gmail.com>
Cc: SeongJae Park <sjpark@amazon.de>
Cc: Jonathan Neuschfer <j.neuschaefer@gmx.net>
Cc: Luca Ceresoli <luca@lucaceresoli.net>
Cc: Joe Perches <joe@perches.com>
Link: https://lkml.kernel.org/r/1601085397-27586-1-git-send-email-wangqing@vivo.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-13 18:38:26 -07:00
Linus Torvalds
50d228345a As hoped, things calmed down for docs this cycle; fewer changes and almost
no conflicts at all.  This pull includes:
 
  - A reworked and expanded user-mode Linux document
  - Some simplifications and improvements for submitting-patches.rst
  - An emergency fix for (some) problems with Sphinx 3.x
  - Some welcome automarkup improvements to automatically generate
    cross-references to struct definitions and other documents
  - The usual collection of translation updates, typo fixes, etc.
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Merge tag 'docs-5.10' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "As hoped, things calmed down for docs this cycle; fewer changes and
  almost no conflicts at all. This includes:

   - A reworked and expanded user-mode Linux document

   - Some simplifications and improvements for submitting-patches.rst

   - An emergency fix for (some) problems with Sphinx 3.x

   - Some welcome automarkup improvements to automatically generate
     cross-references to struct definitions and other documents

   - The usual collection of translation updates, typo fixes, etc"

* tag 'docs-5.10' of git://git.lwn.net/linux: (81 commits)
  gpiolib: Update indentation in driver.rst for code excerpts
  Documentation/admin-guide: tainted-kernels: Fix typo occured
  Documentation: better locations for sysfs-pci, sysfs-tagging
  docs: programming-languages: refresh blurb on clang support
  Documentation: kvm: fix a typo
  Documentation: Chinese translation of Documentation/arm64/amu.rst
  doc: zh_CN: index files in arm64 subdirectory
  mailmap: add entry for <mstarovoitov@marvell.com>
  doc: seq_file: clarify role of *pos in ->next()
  docs: trace: ring-buffer-design.rst: use the new SPDX tag
  Documentation: kernel-parameters: clarify "module." parameters
  Fix references to nommu-mmap.rst
  docs: rewrite admin-guide/sysctl/abi.rst
  docs: fb: Remove vesafb scrollback boot option
  docs: fb: Remove sstfb scrollback boot option
  docs: fb: Remove matroxfb scrollback boot option
  docs: fb: Remove framebuffer scrollback boot option
  docs: replace the old User Mode Linux HowTo with a new one
  Documentation/admin-guide: blockdev/ramdisk: remove use of "rdev"
  Documentation/admin-guide: README & svga: remove use of "rdev"
  ...
2020-10-12 16:21:29 -07:00
Ingo Molnar
d6c4c11348 Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core
Pull KCSAN updates for v5.10 from Paul E. McKenney:

 - Improve kernel messages.

 - Be more permissive with bitops races under KCSAN_ASSUME_PLAIN_WRITES_ATOMIC=y.

 - Optimize debugfs stat counters.

 - Introduce the instrument_*read_write() annotations, to provide a
   finer description of certain ops - using KCSAN's compound instrumentation.
   Use them for atomic RNW and bitops, where appropriate.
   Doing this might find new races.
   (Depends on the compiler having tsan-compound-read-before-write=1 support.)

 - Support atomic built-ins, which will help certain architectures, such as s390.

 - Misc enhancements and smaller fixes.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-10-09 08:56:02 +02:00
Ingo Molnar
e705d39796 Merge branch 'locking/urgent' into locking/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2020-10-09 08:55:17 +02:00
Paul Bolle
d89d5f855f locking/atomics: Check atomic-arch-fallback.h too
The sha1sum of include/linux/atomic-arch-fallback.h isn't checked by
check-atomics.sh. It's not clear why it's skipped so let's check it too.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lkml.kernel.org/r/20201001202028.1048418-1-pebolle@tiscali.nl
2020-10-07 18:14:14 +02:00
Eric Biggers
d43ca1386b scripts/spelling.txt: fix malformed entry
One of the entries has three fields "mistake||correction||correction"
rather than the expected two fields "mistake||correction".  Fix it.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20200930234359.255295-1-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-03 11:28:12 -07:00
Linus Torvalds
02de58b24d Devicetree fixes for v5.9, take 3:
- Fix handling of HOST_EXTRACFLAGS for dtc
 
 - Several warning fixes for DT bindings
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Merge tag 'devicetree-fixes-for-5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:

 - Fix handling of HOST_EXTRACFLAGS for dtc

 - Several warning fixes for DT bindings

* tag 'devicetree-fixes-for-5.9-3' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  scripts/dtc: only append to HOST_EXTRACFLAGS instead of overwriting
  dt-bindings: Fix 'reg' size issues in zynqmp examples
  ARM: dts: bcm2835: Change firmware compatible from simple-bus to simple-mfd
  dt-bindings: leds: cznic,turris-omnia-leds: fix error in binding
  dt-bindings: crypto: sa2ul: fix a DT binding check warning
2020-09-29 17:56:30 -07:00
Uwe Kleine-König
efe84d408b scripts/dtc: only append to HOST_EXTRACFLAGS instead of overwriting
When building with

	$ HOST_EXTRACFLAGS=-g make

the expectation is that host tools are built with debug informations.
This however doesn't happen if the Makefile assigns a new value to the
HOST_EXTRACFLAGS instead of appending to it. So use += instead of := for
the first assignment.

Fixes: e3fd9b5384 ("scripts/dtc: consolidate include path options in Makefile")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Rob Herring <robh@kernel.org>
2020-09-29 15:48:08 -05:00
Masahiro Yamada
516d980f85 scripts/kallsyms: skip ppc compiler stub *.long_branch.* / *.plt_branch.*
PowerPC allmodconfig often fails to build as follows:

    LD      .tmp_vmlinux.kallsyms1
    KSYM    .tmp_vmlinux.kallsyms1.o
    LD      .tmp_vmlinux.kallsyms2
    KSYM    .tmp_vmlinux.kallsyms2.o
    LD      .tmp_vmlinux.kallsyms3
    KSYM    .tmp_vmlinux.kallsyms3.o
    LD      vmlinux
    SORTTAB vmlinux
    SYSMAP  System.map
  Inconsistent kallsyms data
  Try make KALLSYMS_EXTRA_PASS=1 as a workaround
  make[2]: *** [../Makefile:1162: vmlinux] Error 1

Setting KALLSYMS_EXTRA_PASS=1 does not help.

This is caused by the compiler inserting stubs such as *.long_branch.*
and *.plt_branch.*

  $ powerpc-linux-nm -n .tmp_vmlinux.kallsyms2
   [ snip ]
  c00000000210c010 t 00000075.plt_branch.da9:19
  c00000000210c020 t 00000075.plt_branch.1677:5
  c00000000210c030 t 00000075.long_branch.memmove
  c00000000210c034 t 00000075.plt_branch.9e0:5
  c00000000210c044 t 00000075.plt_branch.free_initrd_mem
    ...

Actually, the problem mentioned in scripts/link-vmlinux.sh comments;
"In theory it's possible this results in even more stubs, but unlikely"
is happening here, and ends up with another kallsyms step required.

scripts/kallsyms.c already ignores various compiler stubs. Let's do
similar to make kallsysms for PowerPC always succeed in 2 steps.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
2020-09-25 00:41:54 +09:00
Masahiro Yamada
a46afd1141 kconfig: qconf: revive help message in the info view
Since commit 68fd110b3e ("kconfig: qconf: remove redundant help in
the info view"), the help message is no longer displayed.

I intended to drop duplicated "Symbol:", "Type:", but precious info
about help and reverse dependencies was lost too.

Revive it now.

"defined at" is contained in menu_get_ext_help(), so I made sure
to not display it twice.

Fixes: 68fd110b3e ("kconfig: qconf: remove redundant help in the info view")
Reported-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-09-20 12:58:54 +09:00
Masahiro Yamada
19b835a5db kconfig: qconf: fix incomplete type 'struct gstr' warning
"make HOSTCXX=clang++ xconfig" reports the following:

  HOSTCXX scripts/kconfig/qconf.o
In file included from scripts/kconfig/qconf.cc:23:
In file included from scripts/kconfig/lkc.h:15:
scripts/kconfig/lkc_proto.h:26:13: warning: 'get_relations_str' has C-linkage specified, but returns incomplete type 'struct gstr' which could be incompatible with C [-Wreturn-type-c-linkage]
struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head);
            ^

Currently, get_relations_str() is declared before the struct gstr
definition.

Move all declarations of menu.c functions below.

BTW, some are declared in lkc.h and some in lkc_proto.h, but the
difference is unclear. I guess some refactoring is needed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Boris Kolpackov <boris@codesynthesis.com>
2020-09-20 12:58:49 +09:00
Masahiro Yamada
a608b6a646 kconfig: qconf: use delete[] instead of delete to free array (again)
Commit c9b09a9249 ("kconfig: qconf: use delete[] instead of delete
to free array") fixed two lines, but there is one more.
(cppcheck does not report it for some reason...)

This was detected by Clang.

"make HOSTCXX=clang++ xconfig" reports the following:

scripts/kconfig/qconf.cc:1279:2: warning: 'delete' applied to a pointer that was allocated with 'new[]'; did you mean 'delete[]'? [-Wmismatched-new-delete]
        delete data;
        ^
              []
scripts/kconfig/qconf.cc:1239:15: note: allocated with 'new[]' here
        char *data = new char[count + 1];
                     ^

Fixes: c4f7398bee ("kconfig: qconf: make debug links work again")
Fixes: c9b09a9249 ("kconfig: qconf: use delete[] instead of delete to free array")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
2020-09-19 00:12:13 +09:00
Jonathan Cameron
a070991fe9 kernel-doc: add support for ____cacheline_aligned attribute
Subroutine dump_struct uses type attributes to check if the struct
syntax is valid. Then, it removes all attributes before using it for
output. `____cacheline_aligned` is an attribute that is
not included in both steps. Add it, since it is used by kernel structs.

Based on previous patch to add ____cacheline_aligned_in_smp.
Motivated by patches to reorder this attribute to before the
variable name.   Whilst we could do that in all cases, that would
be a massive change and it is more common in the kernel to place
this particular attribute after the variable name. A quick grep
suggests approximately 400 instances of which 341 have this
attribute just before a semicolon and hence after the variable name.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200910185415.653139-1-jic23@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-16 12:27:28 -06:00
Linus Torvalds
2a1a4bee5e Char / Misc driver fixes for 5.9-rc5
Here are a number of small driver fixes for 5.9-rc5
 
 Included in here are:
 	- habanalabs driver fixes
 	- interconnect driver fixes
 	- soundwire driver fixes
 	- dyndbg fixes for reported issues, and then reverts to fix it
 	  all up to a sane state.
 	- phy driver fixes
 Full details of these are in the shortlog.
 
 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-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc driver fixes from Greg KH:
 "Here are a number of small driver fixes for 5.9-rc5

  Included in here are:

   - habanalabs driver fixes

   - interconnect driver fixes

   - soundwire driver fixes

   - dyndbg fixes for reported issues, and then reverts to fix it all up
     to a sane state.

   - phy driver fixes

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

* tag 'char-misc-5.9-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  Revert "dyndbg: accept query terms like file=bar and module=foo"
  Revert "dyndbg: fix problem parsing format="foo bar""
  scripts/tags.sh: exclude tools directory from tags generation
  video: fbdev: fix OOB read in vga_8planes_imageblit()
  dyndbg: fix problem parsing format="foo bar"
  dyndbg: refine export, rename to dynamic_debug_exec_queries()
  dyndbg: give %3u width in pr-format, cosmetic only
  interconnect: qcom: Fix small BW votes being truncated to zero
  soundwire: fix double free of dangling pointer
  interconnect: Show bandwidth for disabled paths as zero in debugfs
  habanalabs: fix report of RAZWI initiator coordinates
  habanalabs: prevent user buff overflow
  phy: omap-usb2-phy: disable PHY charger detect
  phy: qcom-qmp: Use correct values for ipq8074 PCIe Gen2 PHY init
  soundwire: bus: fix typo in comment on INTSTAT registers
  phy: qualcomm: fix return value check in qcom_ipq806x_usb_phy_probe()
  phy: qualcomm: fix platform_no_drv_owner.cocci warnings
2020-09-13 08:52:21 -07:00
Mauro Carvalho Chehab
c9a6bef24e scripts: device_attr_show.cocci: update location of sysfs doc
sysfs.txt was converted and renamed to sysfs.rst.

Update device_attr_show.cocci script accordingly.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/048ed24b09aefa0051d76396d6250e35e6ba035c.1599660067.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-10 10:47:52 -06:00
Mauro Carvalho Chehab
5eb6b4b3e2 kernel-doc: include line numbers for function prototypes
This should solve bad error reports like this one:

	./include/linux/iio/iio.h:0: WARNING: Unknown target name: "devm".

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/56eed0ba50cd726236acd12b11b55ce54854c5ea.1599660067.git.mchehab+huawei@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-09-10 10:44:46 -06:00
Rustam Kovhaev
162343a876 scripts/tags.sh: exclude tools directory from tags generation
when COMPILED_SOURCE is set, running 'make ARCH=x86_64 COMPILED_SOURCE=1
cscope tags' in KBUILD_OUTPUT directory produces lots of "No such file
or directory" warnings:
...
realpath: sigchain.h: No such file or directory
realpath: orc_gen.c: No such file or directory
realpath: objtool.c: No such file or directory
...
let's exclude tools directory from tags generation

Fixes: 4f491bb6ea ("scripts/tags.sh: collect compiled source precisely")
Link: https://lore.kernel.org/lkml/20200809210056.GA1344537@thinkpad
Signed-off-by: Rustam Kovhaev <rkovhaev@gmail.com>
Link: https://lore.kernel.org/r/20200810153650.1822316-1-rkovhaev@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-07 15:34:03 +02:00
Linus Torvalds
7514c0362f Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton:
 "19 patches.

  Subsystems affected by this patch series: MAINTAINERS, ipc, fork,
  checkpatch, lib, and mm (memcg, slub, pagemap, madvise, migration,
  hugetlb)"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  include/linux/log2.h: add missing () around n in roundup_pow_of_two()
  mm/khugepaged.c: fix khugepaged's request size in collapse_file
  mm/hugetlb: fix a race between hugetlb sysctl handlers
  mm/hugetlb: try preferred node first when alloc gigantic page from cma
  mm/migrate: preserve soft dirty in remove_migration_pte()
  mm/migrate: remove unnecessary is_zone_device_page() check
  mm/rmap: fixup copying of soft dirty and uffd ptes
  mm/migrate: fixup setting UFFD_WP flag
  mm: madvise: fix vma user-after-free
  checkpatch: fix the usage of capture group ( ... )
  fork: adjust sysctl_max_threads definition to match prototype
  ipc: adjust proc_ipc_sem_dointvec definition to match prototype
  mm: track page table modifications in __apply_to_page_range()
  MAINTAINERS: IA64: mark Status as Odd Fixes only
  MAINTAINERS: add LLVM maintainers
  MAINTAINERS: update Cavium/Marvell entries
  mm: slub: fix conversion of freelist_corrupted()
  mm: memcg: fix memcg reclaim soft lockup
  memcg: fix use-after-free in uncharge_batch
2020-09-05 13:28:40 -07:00
Mrinal Pandey
13e45417ce checkpatch: fix the usage of capture group ( ... )
The usage of "capture group (...)" in the immediate condition after `&&`
results in `$1` being uninitialized.  This issues a warning "Use of
uninitialized value $1 in regexp compilation at ./scripts/checkpatch.pl
line 2638".

I noticed this bug while running checkpatch on the set of commits from
v5.7 to v5.8-rc1 of the kernel on the commits with a diff content in
their commit message.

This bug was introduced in the script by commit e518e9a59e
("checkpatch: emit an error when there's a diff in a changelog").  It
has been in the script since then.

The author intended to store the match made by capture group in variable
`$1`.  This should have contained the name of the file as `[\w/]+`
matched.  However, this couldn't be accomplished due to usage of capture
group and `$1` in the same regular expression.

Fix this by placing the capture group in the condition before `&&`.
Thus, `$1` can be initialized to the text that capture group matches
thereby setting it to the desired and required value.

Fixes: e518e9a59e ("checkpatch: emit an error when there's a diff in a changelog")
Signed-off-by: Mrinal Pandey <mrinalmni@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Joe Perches <joe@perches.com>
Link: https://lkml.kernel.org/r/20200714032352.f476hanaj2dlmiot@mrinalpandey
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-09-05 12:14:29 -07:00
Denis Efremov
163e0c27fe kconfig: remove redundant assignment prompt = prompt
Semi-automatic removing of localization macros changed the line
from "prompt = _(prompt);" to "prompt = prompt;". Drop the
reduntand assignment.

Fixes: 694c49a7c0 ("kconfig: drop localization support")
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-09-03 12:21:22 +09:00
Randy Dunlap
a73fbfce2c kconfig: streamline_config.pl: check defined(ENV variable) before using it
A user reported:
'Use of uninitialized value $ENV{"LMC_KEEP"} in split at
 ./scripts/kconfig/streamline_config.pl line 596.'

so first check that $ENV{LMC_KEEP} is defined before trying
to use it.

Fixes: c027b02d89 ("streamline_config.pl: add LMC_KEEP to preserve some kconfigs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-09-03 12:16:30 +09:00
Peter Zijlstra
6eb6d05958 seqlock,tags: Add support for SEQCOUNT_LOCKTYPE()
Such that we might easily find seqcount_LOCKTYPE_t and
seqcount_LOCKTYPE_init().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200729161938.GB2678@hirez.programming.kicks-ass.net
2020-08-26 12:42:01 +02:00
Marco Elver
3570a1bcf4 locking/atomics: Use read-write instrumentation for atomic RMWs
Use instrument_atomic_read_write() for atomic RMW ops.

Cc: Will Deacon <will@kernel.org>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: <linux-arch@vger.kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-08-24 15:09:59 -07:00
Marco Elver
14e2ac8de0 kcsan: Support compounded read-write instrumentation
Add support for compounded read-write instrumentation if supported by
the compiler. Adds the necessary instrumentation functions, and a new
type which is used to generate a more descriptive report.

Furthermore, such compounded memory access instrumentation is excluded
from the "assume aligned writes up to word size are atomic" rule,
because we cannot assume that the compiler emits code that is atomic for
compound ops.

LLVM/Clang added support for the feature in:
785d41a261

The new instrumentation is emitted for sets of memory accesses in the
same basic block to the same address with at least one read appearing
before a write. These typically result from compound operations such as
++, --, +=, -=, |=, &=, etc. but also equivalent forms such as "var =
var + 1". Where the compiler determines that it is equivalent to emit a
call to a single __tsan_read_write instead of separate __tsan_read and
__tsan_write, we can then benefit from improved performance and better
reporting for such access patterns.

The new reports now show that the ops are both reads and writes, for
example:

	read-write to 0xffffffff90548a38 of 8 bytes by task 143 on cpu 3:
	 test_kernel_rmw_array+0x45/0xa0
	 access_thread+0x71/0xb0
	 kthread+0x21e/0x240
	 ret_from_fork+0x22/0x30

	read-write to 0xffffffff90548a38 of 8 bytes by task 144 on cpu 2:
	 test_kernel_rmw_array+0x45/0xa0
	 access_thread+0x71/0xb0
	 kthread+0x21e/0x240
	 ret_from_fork+0x22/0x30

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-08-24 15:09:32 -07:00
Masahiro Yamada
510bc3cb1d kconfig: qconf: replace deprecated QString::sprintf() with QTextStream
QString::sprintf() is deprecated in the latest Qt version, and spawns
a lot of warnings:

  HOSTCXX scripts/kconfig/qconf.o
scripts/kconfig/qconf.cc: In member function ‘void ConfigInfoView::menuInfo()’:
scripts/kconfig/qconf.cc:1090:61: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1090 |      head += QString().sprintf("<a href=\"s%s\">", sym->name);
      |                                                             ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc:1099:60: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1099 |     head += QString().sprintf("<a href=\"s%s\">", sym->name);
      |                                                            ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc:1127:90: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1127 |   debug += QString().sprintf("defined at %s:%d<br><br>", _menu->file->name, _menu->lineno);
      |                                                                                          ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc: In member function ‘QString ConfigInfoView::debug_info(symbol*)’:
scripts/kconfig/qconf.cc:1150:68: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1150 |    debug += QString().sprintf("prompt: <a href=\"m%s\">", sym->name);
      |                                                                    ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc: In static member function ‘static void ConfigInfoView::expr_print_help(void*, symbol*, const char*)’:
scripts/kconfig/qconf.cc:1225:59: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1225 |   *text += QString().sprintf("<a href=\"s%s\">", sym->name);
      |                                                           ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~

The documentation also says:
"Warning: We do not recommend using QString::asprintf() in new Qt code.
Instead, consider using QTextStream or arg(), both of which support
Unicode strings seamlessly and are type-safe."

Use QTextStream as suggested.

Reported-by: Robert Crawford <flacycads@cox.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-21 10:23:38 +09:00
Masahiro Yamada
68fd110b3e kconfig: qconf: remove redundant help in the info view
The same information is repeated in the info view.

Remove the second one.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-21 10:23:37 +09:00
Masahiro Yamada
53efe2e76c kconfig: qconf: remove qInfo() to get back Qt4 support
qconf is supposed to work with Qt4 and Qt5, but since commit
c4f7398bee ("kconfig: qconf: make debug links work again"),
building with Qt4 fails as follows:

  HOSTCXX scripts/kconfig/qconf.o
scripts/kconfig/qconf.cc: In member function ‘void ConfigInfoView::clicked(const QUrl&)’:
scripts/kconfig/qconf.cc:1241:3: error: ‘qInfo’ was not declared in this scope; did you mean ‘setInfo’?
 1241 |   qInfo() << "Clicked link is empty";
      |   ^~~~~
      |   setInfo
scripts/kconfig/qconf.cc:1254:3: error: ‘qInfo’ was not declared in this scope; did you mean ‘setInfo’?
 1254 |   qInfo() << "Clicked symbol is invalid:" << data;
      |   ^~~~~
      |   setInfo
make[1]: *** [scripts/Makefile.host:129: scripts/kconfig/qconf.o] Error 1
make: *** [Makefile:606: xconfig] Error 2

qInfo() does not exist in Qt4. In my understanding, these call-sites
should be unreachable. Perhaps, qWarning(), assertion, or something
is better, but qInfo() is not the right one to use here, I think.

Fixes: c4f7398bee ("kconfig: qconf: make debug links work again")
Reported-by: Ronald Warsow <rwarsow@gmx.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-21 10:22:46 +09:00
Masahiro Yamada
66c262be8f kconfig: qconf: remove unused colNr
This is not used at all.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-18 20:16:46 +09:00
Masahiro Yamada
7d1300e631 kconfig: qconf: fix the popup menu in the ConfigInfoView window
I do not know when ConfigInfoView::createStandardContextMenu() is
called.

Because QTextEdit::createStandardContextMenu() is not virtual,
ConfigInfoView::createStandardContextMenu() cannot override it.
Even if right-click the ConfigInfoView window, the "Show Debug Info"
menu does not show up.

Build up the menu in the constructor, and invoke it from the
contextMenuEvent().

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-18 20:16:46 +09:00
Masahiro Yamada
d85de3399f kconfig: qconf: fix signal connection to invalid slots
If you right-click in the ConfigList window, you will see the following
messages in the console:

QObject::connect: No such slot QAction::setOn(bool) in scripts/kconfig/qconf.cc:888
QObject::connect:  (sender name:   'config')
QObject::connect: No such slot QAction::setOn(bool) in scripts/kconfig/qconf.cc:897
QObject::connect:  (sender name:   'config')
QObject::connect: No such slot QAction::setOn(bool) in scripts/kconfig/qconf.cc:906
QObject::connect:  (sender name:   'config')

Right, there is no such slot in QAction. I think this is a typo of
setChecked.

Due to this bug, when you toggled the menu "Option->Show Name/Range/Data"
the state of the context menu was not previously updated. Fix this.

Fixes: d5d973c3f8 ("Port xconfig to Qt5 - Put back some of the old implementation(part 2)")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-18 20:16:46 +09:00
Joe Perches
e29a6d633e genksyms: keywords: Use __restrict not _restrict
Use the proper form of the RESTRICT keyword.

Quote the comments properly too.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-18 20:16:46 +09:00
Masahiro Yamada
1dbcf46d51 extract-cert: add static to local data
Fix the following warning from sparse:

  scripts/extract-cert.c:74:5: warning: symbol 'kbuild_verbose' was not declared. Should it be static?

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-18 20:16:46 +09:00
Joe Perches
a97ea93ed5 Makefile.extrawarn: Move sign-compare from W=2 to W=3
This -Wsign-compare compiler warning can be very noisy
and most of the suggested conversions are unnecessary.

Make the warning W=3 so it's described under the
"can most likely be ignored" block.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-18 01:52:08 +09:00
Linus Torvalds
32b2ee5cea Kconfig updates for v5.9
- remove '---help---' keyword support
 
  - fix mouse events for 'menuconfig' symbols in search view of qconf
 
  - code cleanups of qconf
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Merge tag 'kconfig-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kconfig updates from Masahiro Yamada:

 - remove '---help---' keyword support

 - fix mouse events for 'menuconfig' symbols in search view of qconf

 - code cleanups of qconf

* tag 'kconfig-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (24 commits)
  kconfig: qconf: move setOptionMode() to ConfigList from ConfigView
  kconfig: qconf: do not limit the pop-up menu to the first row
  kconfig: qconf: refactor icon setups
  kconfig: qconf: remove unused voidPix, menuInvPix
  kconfig: qconf: remove ConfigItem::text/setText
  kconfig: qconf: remove ConfigList::addColumn/removeColumn
  kconfig: qconf: remove ConfigItem::pixmap/setPixmap
  kconfig: qconf: drop more localization code
  kconfig: qconf: remove 'parent' from ConfigList::updateMenuList()
  kconfig: qconf: remove unused argument from ConfigView::updateList()
  kconfig: qconf: remove unused argument from ConfigList::updateList()
  kconfig: qconf: omit parent to QHBoxLayout()
  kconfig: qconf: remove name from ConfigSearchWindow constructor
  kconfig: qconf: remove unused ConfigList::listView()
  kconfig: qconf: overload addToolBar() to create and insert toolbar
  kconfig: qconf: remove toolBar from ConfigMainWindow members
  kconfig: qconf: use 'menu' variable for (QMenu *)
  kconfig: qconf: do not use 'menu' variable for (QMenuBar *)
  kconfig: qconf: remove ->addSeparator() to menuBar
  kconfig: add 'static' to some file-local data
  ...
2020-08-14 11:04:45 -07:00
Masahiro Yamada
d4bbe8a1b5 kconfig: qconf: move setOptionMode() to ConfigList from ConfigView
ConfigView::setOptionMode() only gets access to the 'list' member.

Move it to the more relevant ConfigList class.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:47:21 +09:00
Masahiro Yamada
fa8de0a3bf kconfig: qconf: do not limit the pop-up menu to the first row
If you right-click the first row in the option tree, the pop-up menu
shows up, but if you right-click the second row or below, the event
is ignored due to the following check:

  if (e->y() <= header()->geometry().bottom()) {

Perhaps, the intention was to show the pop-menu only when the tree
header was right-clicked, but this handler is not called in that case.

Since the origin of e->y() starts from the bottom of the header,
this check is odd.

Going forward, you can right-click anywhere in the tree to get the
pop-up menu.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:47:07 +09:00
Masahiro Yamada
5cb255ffa1 kconfig: qconf: refactor icon setups
These icon data are used by ConfigItem, but stored in each instance
of ConfigView. There is no point to keep the same data in each of 3
instances, "menu", "config", and "search".

Move the icon data to the more relevant ConfigItem class, and make
them static members.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:46:36 +09:00
Masahiro Yamada
4fa91f528f kconfig: qconf: remove unused voidPix, menuInvPix
These are initialized, but not used by anyone.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:46:09 +09:00
Masahiro Yamada
5ca534cdf9 kconfig: qconf: remove ConfigItem::text/setText
Use QTreeWidgetItem::text/setText directly

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:45:51 +09:00
Masahiro Yamada
abf741a9fa kconfig: qconf: remove ConfigList::addColumn/removeColumn
Use QTreeView::showColumn/hideColumn directly.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:45:38 +09:00
Masahiro Yamada
711b875bcd kconfig: qconf: remove ConfigItem::pixmap/setPixmap
Use QTreeWidgetItem::icon/setIcon directly.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:45:25 +09:00
Masahiro Yamada
3c73ff040e kconfig: qconf: drop more localization code
This is a remnant of commit 694c49a7c0 ("kconfig: drop localization
support").

Get it back to the code prior to commit 3b9fa0931d ("[PATCH] Kconfig
i18n support").

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:45:12 +09:00
Masahiro Yamada
5b75a6c896 kconfig: qconf: remove 'parent' from ConfigList::updateMenuList()
All the call-sites of this function pass 'this' to the first argument.

So, 'parent' is always the 'this' pointer.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:43:56 +09:00
Masahiro Yamada
1031685c5e kconfig: qconf: remove unused argument from ConfigView::updateList()
Now that ConfigList::updateList() takes no argument, the 'item' argument
ConfigView::updateList() is no longer used.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:39:41 +09:00
Masahiro Yamada
cb77043f06 kconfig: qconf: remove unused argument from ConfigList::updateList()
This function allocates 'item' before using it, so the argument 'item'
is always shadowed.

Remove the meaningless argument.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:39:14 +09:00
Masahiro Yamada
92641154bf kconfig: qconf: omit parent to QHBoxLayout()
Instead of passing 0 (i.e. nullptr), leave it empty.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:38:56 +09:00
Masahiro Yamada
740fdef853 kconfig: qconf: remove name from ConfigSearchWindow constructor
This constructor is only called with "search" as the second argument.

Hard-code the name in the constructor, and drop it from the function
argument.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:38:39 +09:00
Masahiro Yamada
1b4263e750 kconfig: qconf: remove unused ConfigList::listView()
I do not know how this function can be useful. In fact, it is unsed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-08-14 13:37:47 +09:00