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BPF programs explicitly initialise global variables to 0 to make sure
clang (v10 or older) do not put the variables in the common section. Skip
"initialise globals to 0" check for BPF programs to elimiate error
messages like:
ERROR: do not initialise globals to 0
#19: FILE: samples/bpf/tracex1_kern.c:21:
Link: https://lkml.kernel.org/r/20210209211954.490077-1-songliubraving@fb.com
Signed-off-by: Song Liu <songliubraving@fb.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This check erroneously flags cases like the one in my recent printk
enumeration patch[0], where the spaces are syntactic, and `section:' vs.
`section :' is syntactically important:
ERROR: space prohibited before that ':' (ctx:WxW)
#258: FILE: include/asm-generic/vmlinux.lds.h:314:
+ .printk_fmts : AT(ADDR(.printk_fmts) - LOAD_OFFSET) {
0: https://lore.kernel.org/patchwork/patch/1375749/
Link: https://lkml.kernel.org/r/YBwhqsc2TIVeid3t@chrisdown.name
Link: https://lkml.kernel.org/r/YB6UsjCOy1qrrlSD@chrisdown.name
Signed-off-by: Chris Down <chris@chrisdown.name>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
commit 5799b255c4 ("include/linux/slab.h: add kmalloc_array_node() and
kcalloc_node()") was added in 2017. Update the unnecessary OOM message
test to include it.
Link: https://lkml.kernel.org/r/b9dc4a808b1518e08ab8761480d9872e5d18e7cd.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
objtool requires that all code must be contained in an ELF symbol. Symbol
names that have a '.L' prefix do not emit symbol table entries, as they
have special meaning for the assembler.
'.L' prefixed symbols can be used within a code region, but should be
avoided for denoting a range of code via 'SYM_*_START/END' annotations.
Add a new check to emit a warning on finding the usage of '.L' symbols for
'.S' files, if it denotes range of code via SYM_*_START/END annotation
pair.
Link: https://lkml.kernel.org/r/20210123190459.9701-1-yashsri421@gmail.com
Link: https://lore.kernel.org/lkml/20210112210154.GI4646@sirena.org.uk
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Suggested-by: Mark Brown <broonie@kernel.org>
Acked-by: Joe Perches <joe@perches.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: Aditya Srivastava <yashsri421@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Improve the TYPECAST_INT_CONSTANT test by showing the suggested conversion
for various type of uses like (unsigned int)1 to 1U.
Link: https://lkml.kernel.org/r/ecefe8dcb93fe7028311b69dd297ba52224233d4.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Prefer using ftrace over function entry/exit logging messages.
Warn with various function entry/exit only logging that only
use __func__ with or without descriptive decoration.
Link: https://lkml.kernel.org/r/47c01081533a417c99c9a80a4cd537f8c308503f.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Indentations should use tabs wherever possible.
Replace spaces by tabs for indents.
Link: https://lkml.kernel.org/r/20210105103044.40282-1-dwaipayanray1@gmail.com
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Some max_length wants to hold as large room as possible to ensure enough
size to tackle with the biggest NR_CPUS. An example below:
kernel/cgroup/cpuset.c:
static struct cftype legacy_files[] = {
{
.name = "cpus",
.seq_show = cpuset_common_seq_show,
.write = cpuset_write_resmask,
.max_write_len = (100U + 6 * NR_CPUS),
.private = FILE_CPULIST,
},
...
}
Link: https://lkml.kernel.org/r/5d4998aa8a8ac7efada2c7daffa9e73559f8b186.1609331255.git.rocking@linux.alibaba.com
Signed-off-by: Peng Wang <rocking@linux.alibaba.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Avoid multiple false positives by ignoring attributes.
Various attributes like volatile and ____cacheline_aligned_in_smp cause
checkpatch to emit invalid "Missing a blank line after declarations"
messages.
Use copies of $sline and $prevline, remove $Attribute and $Sparse, and use
the existing tests to avoid these false positives.
Miscellanea:
o Add volatile to $Attribute
This also reduces checkpatch runtime a bit by moving the indentation
comparison test to the start of the block to avoid multiple unnecessary
regex tests.
Link: https://lkml.kernel.org/r/9015fd00742bf4e5b824ad6d7fd7189530958548.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Summary of modules changes for the 5.12 merge window:
- Retire EXPORT_UNUSED_SYMBOL() and EXPORT_SYMBOL_GPL_FUTURE(). These export
types were introduced between 2006 - 2008. All the of the unused symbols have
been long removed and gpl future symbols were converted to gpl quite a long
time ago, and I don't believe these export types have been used ever since.
So, I think it should be safe to retire those export types now. (Christoph Hellwig)
- Refactor and clean up some aged code cruft in the module loader (Christoph Hellwig)
- Build {,module_}kallsyms_on_each_symbol only when livepatching is enabled, as
it is the only caller (Christoph Hellwig)
- Unexport find_module() and module_mutex and fix the last module
callers to not rely on these anymore. Make module_mutex internal to
the module loader. (Christoph Hellwig)
- Harden ELF checks on module load and validate ELF structures before checking
the module signature (Frank van der Linden)
- Fix undefined symbol warning for clang (Fangrui Song)
- Fix smatch warning (Dan Carpenter)
Signed-off-by: Jessica Yu <jeyu@kernel.org>
-----BEGIN PGP SIGNATURE-----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=T29Q
-----END PGP SIGNATURE-----
Merge tag 'modules-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux
Pull module updates from Jessica Yu:
- Retire EXPORT_UNUSED_SYMBOL() and EXPORT_SYMBOL_GPL_FUTURE(). These
export types were introduced between 2006 - 2008. All the of the
unused symbols have been long removed and gpl future symbols were
converted to gpl quite a long time ago, and I don't believe these
export types have been used ever since. So, I think it should be safe
to retire those export types now (Christoph Hellwig)
- Refactor and clean up some aged code cruft in the module loader
(Christoph Hellwig)
- Build {,module_}kallsyms_on_each_symbol only when livepatching is
enabled, as it is the only caller (Christoph Hellwig)
- Unexport find_module() and module_mutex and fix the last module
callers to not rely on these anymore. Make module_mutex internal to
the module loader (Christoph Hellwig)
- Harden ELF checks on module load and validate ELF structures before
checking the module signature (Frank van der Linden)
- Fix undefined symbol warning for clang (Fangrui Song)
- Fix smatch warning (Dan Carpenter)
* tag 'modules-for-v5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
module: potential uninitialized return in module_kallsyms_on_each_symbol()
module: remove EXPORT_UNUSED_SYMBOL*
module: remove EXPORT_SYMBOL_GPL_FUTURE
module: move struct symsearch to module.c
module: pass struct find_symbol_args to find_symbol
module: merge each_symbol_section into find_symbol
module: remove each_symbol_in_section
module: mark module_mutex static
kallsyms: only build {,module_}kallsyms_on_each_symbol when required
kallsyms: refactor {,module_}kallsyms_on_each_symbol
module: use RCU to synchronize find_module
module: unexport find_module and module_mutex
drm: remove drm_fb_helper_modinit
powerpc/powernv: remove get_cxl_module
module: harden ELF info handling
module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols
mutex_trylock_recursive() has been removed from the tree, there is no
need to check for it.
Remove traces of mutex_trylock_recursive()'s existence.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210210085248.219210-3-bigeasy@linutronix.de
EXPORT_UNUSED_SYMBOL* is not actually used anywhere. Remove the
unused functionality as we generally just remove unused code anyway.
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
This reverts commit 327953e9af.
You cannot use 'boolean' since commit b92d804a51 ("kconfig: drop
'boolean' keyword").
This check is no longer needed.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Joe Perches <joe@perches.com>
Prefer strscpy over the deprecated strlcpy function.
Link: https://lkml.kernel.org/r/19fe91084890e2c16fe56f960de6c570a93fa99b.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Requested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
checkpatch reports a false TYPO_SPELLING warning for some words containing
an apostrophe when run with --codespell option.
A false positive is "doesn't". Occurrence of the word causes checkpatch
to emit the following warning:
"WARNING: 'doesn'' may be misspelled - perhaps 'doesn't'?"
Modify the regex pattern to be more in line with the codespell default
word matching regex. This fixes the word capture and avoids the false
warning.
In addition, highlight the misspelled word location by adding a caret
below the word.
[akpm@linux-foundation.org: make matched misspelling more obvious, per Joe]
Link: https://lkml.kernel.org/r/09c24ef1aa2f1c4fe909d76f5426f08780b9d81c.camel@perches.com
Link: https://lkml.kernel.org/r/20201201190729.169733-1-dwaipayanray1@gmail.com
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Suggested-by: Joe Perches <joe@perches.com>
Reported-by: Peilin Ye <yepeilin.cs@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Commit log lines starting with '#' are dropped by git as comments.
Add a check to emit a warning for these lines.
Also add a --fix option to insert a space before the leading '#' in
such lines.
Link: https://lkml.kernel.org/r/20201202205740.127986-1-dwaipayanray1@gmail.com
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Suggested-by: Joe Perches <joe@perches.com>
Suggested-by: Peilin Ye <yepeilin.cs@gmail.com>
Tested-by: Peilin Ye <yepeilin.cs@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Modifiers %h and %hh should never be used.
Commit cbacb5ab0a ("docs: printk-formats: Stop encouraging use of
unnecessary %h[xudi] and %hh[xudi]") specifies that:
"Standard integer promotion is already done and %hx and %hhx is useless
so do not encourage the use of %hh[xudi] or %h[xudi]."
"The "h" and "hh" things should never be used. The only reason for them
being used if you have an "int", but you want to print it out as a
"char" (and honestly, that is a really bad reason, you'd be better off
just using a proper cast to make the code more obvious)."
Add a new check to emit a warning on finding an unneeded use of %h or
%hh modifier.
Also add a fix option to the check.
Link: https://lore.kernel.org/lkml/4910042649a4f3ab22fac93191b8c1fa0a2e17c3.camel@perches.com/
Link: https://lkml.kernel.org/r/20201128200046.78739-1-dwaipayanray1@gmail.com
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Suggested-by: Joe Perches <joe@perches.com>
Suggested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently checkpatch warns for BAD_SIGN_OFF on non-standard signature
styles.
A large number of these warnings occur because of typo mistakes in
signature tags. An evaluation over v4.13..v5.8 showed that out of 539
warnings due to non-standard signatures, 87 are due to typo mistakes.
Following are the standard signature tags which are often incorrectly
used, along with their individual counts of incorrect use (over
v4.13..v5.8):
Reviewed-by: 42
Signed-off-by: 25
Reported-by: 6
Acked-by: 4
Tested-by: 4
Suggested-by: 4
Provide a fix by calculating levenshtein distance for the signature tag
with all the standard signatures and suggest a fix with a signature, whose
edit distance is less than or equal to 2 with the misspelled signature.
Out of the 86 mispelled signatures fixed with this approach, 85 were found
to be good corrections and 1 was bad correction.
Following was found to be a bad correction:
Tweeted-by (count: 1) => Tested-by
Link: https://lkml.kernel.org/r/20201128204333.7054-1-yashsri421@gmail.com
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently, checkpatch warns if logical continuations are placed at the
start of a line and not at the end of previous line.
E.g., running checkpatch on commit 3485507fc2 ("staging: bcm2835-camera:
Reduce length of enum names") reports:
CHECK:LOGICAL_CONTINUATIONS: Logical continuations should be on the previous line
+ if (!ret
+ && camera_port ==
Provide a simple fix by inserting logical operator at the last
non-comment, non-whitespace char of the previous line and removing from
current line, if both the lines are additions(ie start with '+')
Link: https://lkml.kernel.org/r/20201123102818.24364-1-yashsri421@gmail.com
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently, checkpatch warns us if an assignment operator is placed at the
start of a line and not at the end of previous line.
E.g., running checkpatch on commit 8195b1396e ("hv_netvsc: fix
deadlock on hotplug") reports:
CHECK: Assignment operator '=' should be on the previous line
+ struct netvsc_device *nvdev
+ = container_of(w, struct netvsc_device, subchan_work);
Provide a simple fix by appending assignment operator to the previous
line and removing from the current line, if both the lines are additions
(ie start with '+')
Link: https://lkml.kernel.org/r/20201121120407.22942-1-yashsri421@gmail.com
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There is an unescaped left brace in a regex in OPEN_BRACE check. This
throws a runtime error when checkpatch is run with --fix flag and the
OPEN_BRACE check is executed.
Fix it by escaping the left brace.
Link: https://lkml.kernel.org/r/20201115202928.81955-1-dwaipayanray1@gmail.com
Fixes: 8d1824780f ("checkpatch: add --fix option for a couple OPEN_BRACE misuses")
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently checkpatch warns us for long lines in commits even for signature
tag lines.
Generally these lines exceed the 75-character limit because of:
1) long names and long email address
2) some comments on scoped review and acknowledgement, i.e., for a
dedicated pointer on what was reported by the identity in
'Reported-by'
3) some additional comments on CC: stable@vger.org tags
Exclude signature tag lines from this class of warning.
There were 1896 COMMIT_LOG_LONG_LINE warnings in v5.6..v5.8 before this
patch application and 1879 afterwards.
A quick manual check found all the dropped warnings related to signature
tags.
Link: https://lkml.kernel.org/r/20201116083754.10629-1-yashsri421@gmail.com
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
checkpatch doesn't report warnings for many common mistakes in emails.
Some of which are trailing commas and incorrect use of email comments.
At the same time several false positives are reported due to incorrect
handling of mail comments. The most common of which is due to the
pattern:
<stable@vger.kernel.org> # X.X
Improve email parsing in checkpatch.
Some general email rules are defined:
- Multiple name comments should not be allowed.
- Comments inside address should not be allowed.
- In general comments should be enclosed within parentheses.
Relaxation is given to comments beginning with #.
- Stable addresses should not begin with a name.
- Comments in stable addresses should begin only
with a #.
Improvements to parsing:
- Detect and report unexpected content after email.
- Quoted names are excluded from comment parsing.
- Trailing dots, commas or quotes in email are removed during
formatting. Correspondingly a BAD_SIGN_OFF warning
is emitted.
- Improperly quoted email like '"name <address>"' are now
warned about.
In addition, added fixes for all the possible rules.
Link: https://lore.kernel.org/linux-kernel-mentees/6c275d95c3033422addfc256a30e6ae3dd37941d.camel@perches.com/
Link: https://lore.kernel.org/linux-kernel-mentees/20201105200857.GC1333458@kroah.com/
Link: https://lkml.kernel.org/r/20201108100632.75340-1-dwaipayanray1@gmail.com
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Suggested-by: Joe Perches <joe@perches.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add __alias and __weak to the suggested __attribute__((<foo>))
conversions.
Link: https://lkml.kernel.org/r/7b74137743c58ce0633ec4d575b94e2210e4dbe7.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently, whenever a Gerrit Change-Id is present in a commit,
checkpatch.pl warns to remove the Change-Id before submitting the patch.
E.g., running checkpatch on commit adc311a5bb ("iwlwifi: bump FW
API to 53 for 22000 series") reports this error:
ERROR: Remove Gerrit Change-Id's before submitting upstream
Change-Id: I5725e46394f3f53c3069723fd513cc53c7df383d
Provide a simple fix option by simply deleting the indicated line.
Link: https://lkml.kernel.org/r/20201030114447.24199-1-yashsri421@gmail.com
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
commit 33def8498f ("treewide: Convert macro and uses of
__section(foo) to __section("foo")") removed the stringification of the
section name and now requires quotes around the named section.
Update checkpatch to not remove any quotes when suggesting conversion
of __attribute__((section("name"))) to __section("name")
Miscellanea:
o Add section to the hash with __section replacement
o Remove separate test for __attribute__((section
o Remove the limitation on converting attributes containing only
known, possible conversions. Any unknown attribute types are now
left as-is and known types are converted and moved before
__attribute__ and removed from within the __attribute__((list...)).
[joe@perches.com: eliminate the separate test below the possible conversions loop]
Link: https://lkml.kernel.org/r/58e9d55e933dc8fdc6af489f2ad797fa8eb13e44.camel@perches.com
Link: https://lkml.kernel.org/r/c04dd1c810e8d6a68e6a632e3191ae91651c8edf.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Remove the trailing error message from the fixed lines.
Link: https://lkml.kernel.org/r/20201017142546.28988-1-trix@redhat.com
Signed-off-by: Tom Rix <trix@redhat.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It is generally preferred that the macros from
include/linux/compiler_attributes.h are used, unless there is a reason not
to.
checkpatch currently checks __attribute__ for each of packed, aligned,
section, printf, scanf, and weak. Other declarations in
compiler_attributes.h are not handled.
Add a generic test to check the presence of such attributes. Some
attributes require more specific handling and are kept separate.
Also add fixes to the generic attributes check to substitute the correct
conversions.
New attributes which are now handled are:
__always_inline__
__assume_aligned__(a, ## __VA_ARGS__)
__cold__
__const__
__copy__(symbol)
__designated_init__
__externally_visible__
__gnu_inline__
__malloc__
__mode__(x)
__no_caller_saved_registers__
__noclone__
__noinline__
__nonstring__
__noreturn__
__pure__
__unused__
__used__
Declarations which contain multiple attributes like
__attribute__((__packed__, __cold__)) are also handled except when proper
conversions for one or more attributes of the list cannot be determined.
Link: https://lore.kernel.org/linux-kernel-mentees/3ec15b41754b01666d94b76ce51b9832c2dd577a.camel@perches.com/
Link: https://lkml.kernel.org/r/20201025193103.23223-1-dwaipayanray1@gmail.com
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Suggested-by: Joe Perches <joe@perches.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
switch/case use of break after a return, goto or break is unnecessary.
There is an existing warning for the return and goto uses, so add
break and a --fix option too.
Link: https://lkml.kernel.org/r/d9ea654104d55f590fb97d252d64a66b23c1a096.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Julia Lawall <julia.lawall@inria.fr>
Cc: Tom Rix <trix@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There are about 100,000 uses of 'static const <type>' but about 400 uses
of 'static <type> const' in the kernel where type is not a pointer.
The kernel almost always uses "static const" over "const static" as there
is a compiler warning for that declaration style.
But there is no compiler warning for "static <type> const".
So add a checkpatch warning for the atypical declaration uses of.
const static <type> <foo>
and
static <type> const <foo>
For example:
$ ./scripts/checkpatch.pl -f --emacs --quiet --nosummary -types=static_const arch/arm/crypto/aes-ce-glue.c
arch/arm/crypto/aes-ce-glue.c:75: WARNING: Move const after static - use 'static const u8'
#75: FILE: arch/arm/crypto/aes-ce-glue.c:75:
+ static u8 const rcon[] = {
Link: https://lkml.kernel.org/r/4b863be68e679546b40d50b97a4a806c03056a1c.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Presence of hexadecimal address or symbol results in false warning
message by checkpatch.pl.
For example, running checkpatch on commit b8ad540dd4 ("mptcp: fix
memory leak in mptcp_subflow_create_socket()") results in warning:
WARNING:REPEATED_WORD: Possible repeated word: 'ff'
00 00 00 00 00 00 00 00 00 2f 30 0a 81 88 ff ff ........./0.....
Similarly, the presence of list command output in commit results in
an unnecessary warning.
For example, running checkpatch on commit 899e5ffbf2 ("perf record:
Introduce --switch-output-event") gives:
WARNING:REPEATED_WORD: Possible repeated word: 'root'
dr-xr-x---. 12 root root 4096 Apr 27 17:46 ..
Here, it reports 'ff' and 'root' to be repeated, but it is in fact part
of some address or code, where it has to be repeated.
In these cases, the intent of the warning to find stylistic issues in
commit messages is not met and the warning is just completely wrong in
this case.
To avoid these warnings, add an additional regex check for the directory
permission pattern and avoid checking the line for this class of
warning. Similarly, to avoid hex pattern, check if the word consists of
hex symbols and skip this warning if it is not among the common english
words formed using hex letters.
A quick evaluation on v5.6..v5.8 showed that this fix reduces
REPEATED_WORD warnings by the frequency of 1890.
A quick manual check found all cases are related to hex output or list
command outputs in commit messages.
Link: https://lkml.kernel.org/r/20201024102253.13614-1-yashsri421@gmail.com
Signed-off-by: Aditya Srivastava <yashsri421@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Recently, commit 4f6ad8aa1eac ("checkpatch: move repeated word test")
moved the repeated word test to check for more file types. But after
this, if checkpatch.pl is run on MAINTAINERS, it generates several
new warnings of the type:
WARNING: Possible repeated word: 'git'
For example:
WARNING: Possible repeated word: 'git'
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml.git
So, the pattern "git git://..." is a false positive in this case.
There are several other combinations which may produce a wrong warning
message, such as "@size size", ":Begin begin", etc.
Extend repeated word check to compare the characters before and after
the word matches.
If there is a non whitespace character before the first word or a non
whitespace character excluding punctuation characters after the second
word, then the check is skipped and the warning is avoided.
Also add case insensitive word matching to the repeated word check.
Link: https://lore.kernel.org/linux-kernel-mentees/81b6a0bb2c7b9256361573f7a13201ebcd4876f1.camel@perches.com/
Link: https://lkml.kernel.org/r/20201017162732.152351-1-dwaipayanray1@gmail.com
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Suggested-by: Joe Perches <joe@perches.com>
Suggested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Aditya Srivastava <yashsri421@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If set, use the environment variable GIT_DIR to change the default .git
location of the kernel git tree.
If GIT_DIR is unset, keep using the current ".git" default.
Link: https://lkml.kernel.org/r/c5e23b45562373d632fccb8bc04e563abba4dd1d.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The author signed-off-by checks are currently very vague. Cases like same
name or same address are not handled separately.
For example, running checkpatch on commit be6577af0c ("parisc: Add
atomic64_set_release() define to avoid CPU soft lockups"), gives:
WARNING: Missing Signed-off-by: line by nominal patch author
'John David Anglin <dave.anglin@bell.net>'
The signoff line was:
"Signed-off-by: Dave Anglin <dave.anglin@bell.net>"
Clearly the author has signed off but with a slightly different version
of his name. A more appropriate warning would have been to point out
at the name mismatch instead.
Previously, the values assumed by $authorsignoff were either 0 or 1
to indicate whether a proper sign off by author is present.
Extended the checks to handle four new cases.
$authorsignoff values now denote the following:
0: Missing sign off by patch author.
1: Sign off present and identical.
2: Addresses and names match, but comments differ.
"James Watson(JW) <james@gmail.com>", "James Watson <james@gmail.com>"
3: Addresses match, but names are different.
"James Watson <james@gmail.com>", "James <james@gmail.com>"
4: Names match, but addresses are different.
"James Watson <james@watson.com>", "James Watson <james@gmail.com>"
5: Names match, addresses excluding subaddress details (RFC 5233) match.
"James Watson <james@gmail.com>", "James Watson <james+a@gmail.com>"
Also introduced a new message type FROM_SIGN_OFF_MISMATCH
for cases 2, 3, 4 and 5.
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Joe Perches <joe@perches.com>
Link: https://lore.kernel.org/linux-kernel-mentees/c1ca28e77e8e3bfa7aadf3efa8ed70f97a9d369c.camel@perches.com/
Link: https://lkml.kernel.org/r/20201007192029.551744-1-dwaipayanray1@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
To avoid false positives in presence of SPDX-License-Identifier in
networking files it is required to increase the leeway for empty block
comment lines by one line.
For example, checking drivers/net/loopback.c which starts with
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
rsults in an unnecessary warning
WARNING: networking block comments don't use an empty /* line, use /* Comment...
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Joe Perches <joe@perches.com>
Cc: Bartłomiej Żolnierkiewicz <b.zolnierkie@samsung.co>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lkml.kernel.org/r/20201006083509.19934-1-l.stelmach@samsung.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Checkpatch.pl doesn't have a check for excluding while (...) {...} blocks
from MULTISTATEMENT_MACRO_USE_DO_WHILE error.
For example, running checkpatch.pl on the file mm/maccess.c in the kernel
generates the following error:
ERROR: Macros with complex values should be enclosed in parentheses
+#define copy_from_kernel_nofault_loop(dst, src, len, type, err_label) \
+ while (len >= sizeof(type)) { \
+ __get_kernel_nofault(dst, src, type, err_label); \
+ dst += sizeof(type); \
+ src += sizeof(type); \
+ len -= sizeof(type); \
+ }
The error is misleading for this case. Enclosing it in parentheses
doesn't make any sense.
Checkpatch already has an exception list for such common macro types.
Added a new exception for while (...) {...} style blocks to the same.
In addition, the brace flatten logic was modified by changing the
substitution characters from "1" to "1u". This was done to ensure that
macros in the form "#define foo(bar) while(bar){bar--;}" were also
correctly procecssed.
Link: https://lore.kernel.org/linux-kernel-mentees/dc985938aa3986702815a0bd68dfca8a03c85447.camel@perches.com/
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Dwaipayan Ray <dwaipayanray1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/20201001171903.312021-1-dwaipayanray1@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Embedding the complete filename path inside the file isn't particularly
useful as often the path is moved around and becomes incorrect.
Emit a warning when the source contains the filename.
[akpm@linux-foundation.org: remove stray " di"]
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/1fd5f9188a14acdca703ca00301ee323de672a8d.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Checkpatch did not handle cases where the author From: header was split
into multiple lines. The author identity could not be resolved and
checkpatch generated a false NO_AUTHOR_SIGN_OFF warning.
A typical example is commit e33bcbab16 ("tee: add support for session's
client UUID generation"). When checkpatch was run on this commit, it
displayed:
"WARNING:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal
patch author ''"
This was due to split header lines not being handled properly and the
author himself wrote in commit cd2614967d ("checkpatch: warn if missing
author Signed-off-by"):
"Split From: headers are not fully handled: only the first part
is compared."
Support split From: headers by correctly parsing the header extension
lines. RFC 5322, Section-2.2.3 stated that each extended line must start
with a WSP character (a space or htab). The solution was therefore to
concatenate the lines which start with a WSP to get the correct long
header.
Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Dwaipayan Ray <dwaipayanray1@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>
Acked-by: Joe Perches <joe@perches.com>
Link: https://lore.kernel.org/linux-kernel-mentees/f5d8124e54a50480b0a9fa638787bc29b6e09854.camel@perches.com/
Link: https://lkml.kernel.org/r/20200921085436.63003-1-dwaipayanray1@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If a file exists in git and checkpatch is used without the -f flag for
scanning a file, then checkpatch will scan the file assuming it's a patch
and emit:
ERROR: Does not appear to be a unified-diff format patch
Change the behavior to assume the -f flag if the file exists in git.
[joe@perches.com: fix git "fatal" warning if file argument outside kernel tree]
Link: https://lkml.kernel.org/r/b6afa04112d450c2fc120a308d706acd60cee294.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Julia Lawall <julia.lawall@inria.fr>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lkml.kernel.org/r/45b81a48e1568bd0126a96f5046eb7aaae9b83c9.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The uninitialized_var() macro was removed recently via commit 63a0895d96
("compiler: Remove uninitialized_var() macro") as it's not a particularly
useful warning and its use can "paper over real bugs".
Add a checkpatch test to warn on self-assignments as a means to avoid
compiler warnings and as a back-door mechanism to reproduce the old
uninitialized_var macro behavior.
[akpm@linux-foundation.org: coding style fixes]
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Cc: Denis Efremov <efremov@linux.com>
Cc: Julia Lawall <julia.lawall@inria.fr>
Link: https://lkml.kernel.org/r/afc2cffdd315d3e4394af149278df9e8af7f49f4.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
trace_printk is meant as a debugging tool, and should not be compiled into
production code without specific debug Kconfig options enabled, or source
code changes, as indicated by the warning that shows up on boot if any
trace_printk is called:
** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
** **
** trace_printk() being used. Allocating extra memory. **
** **
** This means that this is a DEBUG kernel and it is **
** unsafe for production use. **
Let's warn developers when they try to submit such a change.
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Joe Perches <joe@perches.com>
Link: https://lkml.kernel.org/r/20200825193600.v2.1.I723c43c155f02f726c97501be77984f1e6bb740a@changeid
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There are commas used as statement terminations that should typically have
used semicolons instead. Only direct assignments or use of a single
function or value on a single line are detected by this test.
e.g.:
foo = bar(), /* typical use is semicolon not comma */
bar = baz();
Add an imperfect test to detect these comma uses.
No false positives were found in testing, but many types of false
negatives are possible.
e.g.:
foo = bar() + 1, /* comma use, but not direct assignment */
bar = baz();
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/3bf27caf462007dfa75647b040ab3191374a59de.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Currently this test only works on .[ch] files.
Move the test to check more file types and the commit log.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/180b3b5677771c902b2e2f7a2b7090ede65fe004.camel@perches.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Kconfig allows to customize the CONFIG_ prefix via the $CONFIG_
environment variable. Out-of-tree projects may therefore use Kconfig with
a different prefix, or they may use a custom configuration tool which does
not use the CONFIG_ prefix at all. Such projects may still want to adhere
to the Linux kernel coding style and run checkpatch.pl.
One example is OP-TEE [1] which does not use Kconfig but does have
configuration options prefixed with CFG_. It also mostly follows the
kernel coding style and therefore being able to use checkpatch is quite
valuable.
To make this possible, add the --kconfig-prefix command line option.
[1] https://github.com/OP-TEE/optee_os
Signed-off-by: Jerome Forissier <jerome@forissier.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200818081732.800449-1-jerome@forissier.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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>
- 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
...
