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| author | Joe Perches <joe@perches.com> | 2018-04-11 02:34:25 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-11 20:28:36 +0300 |
| commit | 5d430902615bdea9d9bc205ed06ffc40d86ea66f (patch) | |
| tree | ec282862c3d5a0dd1b42ac9fc68f1844f5dd3e72 /scripts/checkpatch.pl | |
| parent | 38dca988bb208e66d6fdb6346f7266f3d2d1a8a4 (diff) | |
| download | linux-5d430902615bdea9d9bc205ed06ffc40d86ea66f.tar.xz | |
checkpatch: whinge about bool bitfields
Using bool in a bitfield isn't a good idea as the alignment behavior is
arch implementation defined.
Suggest using unsigned int or u<8|16|32> instead.
Link: http://lkml.kernel.org/r/e22fb871b1b7f2fda4b22f3a24e0d7f092eb612c.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>
Diffstat (limited to 'scripts/checkpatch.pl')
| -rwxr-xr-x | scripts/checkpatch.pl | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index eb534d48140e..e16d6713f236 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -6251,6 +6251,12 @@ sub process { } } +# check for bool bitfields + if ($sline =~ /^.\s+bool\s*$Ident\s*:\s*\d+\s*;/) { + WARN("BOOL_BITFIELD", + "Avoid using bool as bitfield. Prefer bool bitfields as unsigned int or u<8|16|32>\n" . $herecurr); + } + # check for semaphores initialized locked if ($line =~ /^.\s*sema_init.+,\W?0\W?\)/) { WARN("CONSIDER_COMPLETION", |