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Pull documentation updates from Jonathan Corbet:
"A fairly routine cycle for docs - lots of typo fixes, some new
documents, and more translations. There's also some LICENSES
adjustments from Thomas"
* tag 'docs-5.1' of git://git.lwn.net/linux: (74 commits)
docs: Bring some order to filesystem documentation
Documentation/locking/lockdep: Drop last two chars of sample states
doc: rcu: Suspicious RCU usage is a warning
docs: driver-api: iio: fix errors in documentation
Documentation/process/howto: Update for 4.x -> 5.x versioning
docs: Explicitly state that the 'Fixes:' tag shouldn't split lines
doc: security: Add kern-doc for lsm_hooks.h
doc: sctp: Merge and clean up rst files
Docs: Correct /proc/stat path
scripts/spdxcheck.py: fix C++ comment style detection
doc: fix typos in license-rules.rst
Documentation: fix admin-guide/README.rst minimum gcc version requirement
doc: process: complete removal of info about -git patches
doc: translations: sync translations 'remove info about -git patches'
perf-security: wrap paragraphs on 72 columns
perf-security: elaborate on perf_events/Perf privileged users
perf-security: document collected perf_events/Perf data categories
perf-security: document perf_events/Perf resource control
sysfs.txt: add note on available attribute macros
docs: kernel-doc: typo "if ... if" -> "if ... is"
...
Presently C99 style comments are removed unconditionally before actual
patch validity check happens. This is a problem for some third party
projects which use checkpatch.pl but do not allow C99 style comments.
This patch adds yet another variable, named C99_COMMENT_TOLERANCE. If
it is included in the --ignore command line or config file options list,
C99 comments in the patch are reported as errors.
Tested by processing a patch with a C99 style comment, it passes the
check just fine unless '--ignore C99_COMMENT_TOLERANCE' is present in
.checkpatch.conf.
Link: http://lkml.kernel.org/r/20190110224957.25008-1-vbendeb@chromium.org
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Many new generic allocation functions like the kvmalloc family have been
added recently to the kernel.
The allocation functions test now includes:
o kvmalloc and variants
o kstrdup_const
o kmemdup_nul
o dma_alloc_coherent
o alloc_skb and variants
Add a separate $allocFunctions variable to help make the allocation
functions test a bit more readable.
Miscellanea:
o Use $allocFunctions in the unnecessary OOM message test and
add exclude uses with __GFP_NOWARN
o Use $allocFunctions in the unnecessary cast test
o Add the kvmalloc family to the preferred sizeof alloc style
foo = kvmalloc(sizeof(*foo), ...)
Link: http://lkml.kernel.org/r/a5e60a2b93e10baf84af063f6c8e56402273105d.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>
This commit points people who might otherwise code up something like
WARN_ON(!spin_is_locked(&mylock)) to lockdep_assert_held(&mylock).
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Joe Perches <joe@perches.com>
This patch creates a deprecated_apis map, which allows such APIs to
be flagged with suggested replacements more compactly and straightforwardly.
It also uses this map to flag the old flavorful RCU APIs as deprecated,
suggesting their vanilla-RCU counterparts as replacements.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
[ paulmck: Merged with earlier less-deft approach. ]
__ro_after_init is a specific __attribute__ that checkpatch does currently
not understand.
Add it to the known $Attribute types so that code that uses variables
declared with __ro_after_init are not thought to be a modifier type.
This appears as a defect in checkpatch output of code like:
static bool trust_cpu __ro_after_init = IS_ENABLED(CONFIG_RANDOM_TRUST_CPU);
[...]
if (trust_cpu && arch_init) {
where checkpatch reports:
ERROR: space prohibited after that '&&' (ctx:WxW)
if (trust_cpu && arch_init) {
Link: http://lkml.kernel.org/r/0fa8a2cb83ade4c525e18261ecf6cfede3015983.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Multiple line macro definitions where the arguments are separated by line
continuations can cause checkpatch to emit invalid syntax regex tests.
This can occur when a single argument is modified in a part of a patch.
For example: (to not add a diff in the commit message)
$ ./scripts/checkpatch.pl --git db023296f0
Unterminated \g... pattern in regex; <very long regex omitted>
And, the test does not work correctly when these arguments are all new as
the initial patch line addition "+" is used in the argument name.
Fix this by stripping the line continuations and any "+" from the list of
arguments.
Link: http://lkml.kernel.org/r/86cdb43a4db70670c102020093f7fb4eb3003e01.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>
checkpatch repeatedly uses a runtime minimum version check that validates
the minimum perl version required for a regex match by using a "$^V ge
5.10.0" runtime string match.
Only perform that minimum version test once and store the result to reduce
string matching time.
This reduces runtime execution time for patches or files with high line
counts.
An example runtime improvement:
new: $ time ./scripts/checkpatch.pl -f drivers/net/ethernet/intel/i40e/i40e_main.c > /dev/null
real 0m11.856s
user 0m11.831s
sys 0m0.025s
old: $ time ./scripts/checkpatch.pl -f drivers/net/ethernet/intel/i40e/i40e_main.c > /dev/null
real 0m13.330s
user 0m13.282s
sys 0m0.049s
Link: http://lkml.kernel.org/r/db21aa9703833bad65ab70cc4e8a78da5b399138.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>
A struct with a bool member can have different sizes on various
architectures because neither bool size nor alignment is standardized.
So emit a message on the use of bool in structs only in .h files and not
.c files.
There is the real possibility that this test could have a false positive
when a bool is declared as an automatic, so limit the test to .h files
where the only false positive is for declarations in static inline
functions.
Link: http://lkml.kernel.org/r/95477c93db187bab6da8a8ba7c57836868446179.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Multiline statements with invalid %p<foo> uses produce multiple
warnings. Fix that.
e.g.:
$ cat t_block.c
void foo(void)
{
MY_DEBUG(drv->foo,
"%pk",
foo->boo);
}
$ ./scripts/checkpatch.pl -f t_block.c
WARNING: Missing or malformed SPDX-License-Identifier tag in line 1
#1: FILE: t_block.c:1:
+void foo(void)
WARNING: Invalid vsprintf pointer extension '%pk'
#3: FILE: t_block.c:3:
+ MY_DEBUG(drv->foo,
+ "%pk",
+ foo->boo);
WARNING: Invalid vsprintf pointer extension '%pk'
#3: FILE: t_block.c:3:
+ MY_DEBUG(drv->foo,
+ "%pk",
+ foo->boo);
total: 0 errors, 3 warnings, 6 lines checked
NOTE: For some of the reported defects, checkpatch may be able to
mechanically convert to the typical style using --fix or --fix-inplace.
t_block.c has style problems, please review.
NOTE: If any of the errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.
Link: http://lkml.kernel.org/r/9e8341bbe4c9877d159cb512bb701043cbfbb10b.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: "Tobin C. Harding" <me@tobin.cc>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It may not be the actual real stable mailing list address, but the
stable scripts to actually pick up on the traditional way to mark stable
patches.
There are also reasons to explicitly avoid using the actual mailing list
address, since security patches with embargo dates generally do want the
stable marking, but don't want tools etc to mistakenly send the patch
out to the mailing list early.
So don't warn for things that are still actively used and explicitly
supported.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Pull Kbuild updates from Masahiro Yamada:
- improve fixdep to coalesce consecutive slashes in dep-files
- fix some issues of the maintainer string generation in deb-pkg script
- remove unused CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX and clean-up
several tools and linker scripts
- clean-up modpost
- allow to enable the dead code/data elimination for PowerPC in EXPERT
mode
- improve two coccinelle scripts for better performance
- pass endianness and machine size flags to sparse for all architecture
- misc fixes
* tag 'kbuild-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (25 commits)
kbuild: add machine size to CHECKFLAGS
kbuild: add endianness flag to CHEKCFLAGS
kbuild: $(CHECK) doesnt need NOSTDINC_FLAGS twice
scripts: Fixed printf format mismatch
scripts/tags.sh: use `find` for $ALLSOURCE_ARCHS generation
coccinelle: deref_null: improve performance
coccinelle: mini_lock: improve performance
powerpc: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selected
kbuild: Allow LD_DEAD_CODE_DATA_ELIMINATION to be selectable if enabled
kbuild: LD_DEAD_CODE_DATA_ELIMINATION no -ffunction-sections/-fdata-sections for module build
kbuild: Fix asm-generic/vmlinux.lds.h for LD_DEAD_CODE_DATA_ELIMINATION
modpost: constify *modname function argument where possible
modpost: remove redundant is_vmlinux() test
modpost: use strstarts() helper more widely
modpost: pass struct elf_info pointer to get_modinfo()
checkpatch: remove VMLINUX_SYMBOL() check
vmlinux.lds.h: remove no-op macro VMLINUX_SYMBOL()
kbuild: remove CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
export.h: remove code for prefixing symbols with underscore
depmod.sh: remove symbol prefix support
...
Now that VMLINUX_SYMBOL() is no-op and being removed, let's stop
checking VMLINUX_SYMBOL().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Kernel style seems to prefer line wrapping an assignment with the
assignment operator on the previous line like:
<leading tabs> identifier =
expression;
over
<leading tabs> identifier
= expression;
somewhere around a 50:1 ratio
$ git grep -P "[^=]=\s*$" -- "*.[ch]" | wc -l
52008
$ git grep -P "^\s+[\*\/\+\|\%\-]?=[^=>]" | wc -l
1161
So add a --strict test for that condition.
Link: http://lkml.kernel.org/r/1522275726.2210.12.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>
The get_quoted_string function does not expect invalid arguments.
The $stat test can return non-statements for complicated macros like
TRACE_EVENT.
Allow the $stat block and test for vsprintf misuses to exceed the actual
block length and possibly test invalid lines by validating the arguments
of get_quoted_string.
Return "" if either get_quoted_string argument is undefined.
Miscellanea:
o Properly align the comment for the vsprintf extension test
Link: http://lkml.kernel.org/r/9e9725342ca3dfc0f5e3e0b8ca3c482b0e5712cc.1520356392.git.joe@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Reported-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Usage of the new %px specifier potentially leaks sensitive information.
Printing kernel addresses exposes the kernel layout in memory, this is
potentially exploitable. We have tools in the kernel to help us do the
right thing. We can have checkpatch warn developers of potential
dangers of using %px.
Have checkpatch emit a warning for usage of specifier %px.
Link: http://lkml.kernel.org/r/1519700648-23108-5-git-send-email-me@tobin.cc
Signed-off-by: Tobin C. Harding <me@tobin.cc>
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>
Pull Kconfig updates from Masahiro Yamada:
- improve checkpatch for more precise Kconfig code checking
- clarify effective selects by grouping reverse dependencies in help
- do not write out '# CONFIG_FOO is not set' from invisible symbols
- make oldconfig as silent as it should be
- rename 'silentoldconfig' to 'syncconfig'
- add unit-test framework and several test cases
- warn unmet dependency of tristate symbols
- make unmet dependency warnings readable, removing false positives
- improve recursive include detection
- use yylineno to simplify the line number tracking
- misc cleanups
* tag 'kconfig-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (30 commits)
kconfig: use yylineno option instead of manual lineno increments
kconfig: detect recursive inclusion earlier
kconfig: remove duplicated file name and lineno of recursive inclusion
kconfig: do not include both curses.h and ncurses.h for nconfig
kconfig: make unmet dependency warnings readable
kconfig: warn unmet direct dependency of tristate symbols selected by y
kconfig: tests: test if recursive inclusion is detected
kconfig: tests: test if recursive dependencies are detected
kconfig: tests: test randconfig for choice in choice
kconfig: tests: test defconfig when two choices interact
kconfig: tests: check visibility of tristate choice values in y choice
kconfig: tests: check unneeded "is not set" with unmet dependency
kconfig: tests: test if new symbols in choice are asked
kconfig: tests: test automatic submenu creation
kconfig: tests: add basic choice tests
kconfig: tests: add framework for Kconfig unit testing
kbuild: add PYTHON2 and PYTHON3 variables
kconfig: remove redundant streamline_config.pl prerequisite
kconfig: rename silentoldconfig to syncconfig
kconfig: invoke oldconfig instead of silentoldconfig from local*config
...
IMO, we should discourage '---help---' for new help texts, even in cases
where it would be consistent with other help texts in the file. This
will help if we ever want to get rid of '---help---' in the future.
Also simplify the code to only check for exactly '---help---'. Since
commit c2264564df ("kconfig: warn of unhandled characters in Kconfig
commands"), '---help---' is a proper keyword and can only appear in that
form. Prior to that commit, '---help---' working was more of a syntactic
quirk.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, only Kconfig symbols are checked for a missing or short help
text, and are only checked if they are defined with the 'config'
keyword.
To make the check more general, extend it to also check help texts for
choices and for symbols defined with the 'menuconfig' keyword.
This increases the accuracy of the check for symbols that would already
have been checked as well, since e.g. a 'menuconfig' symbol after a help
text will be recognized as ending the preceding symbol/choice
definition.
To increase the accuracy of the check further, also recognize 'if',
'endif', 'menu', 'endmenu', 'endchoice', and 'source' as ending a
symbol/choice definition.
Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
