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| author | Joe Perches <joe@perches.com> | 2013-07-03 15:05:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-03 16:07:44 -0700 |
| commit | 36ec19390effc9131132901e8a66a071a7b74a88 (patch) | |
| tree | a0b823311ee76f1ffc4c2b84f9d35446fc449272 /scripts/checkpatch.pl | |
| parent | a605e32ebde25dc31f943fecb30e3e28079ccd06 (diff) | |
| download | lwn-36ec19390effc9131132901e8a66a071a7b74a88.tar.gz lwn-36ec19390effc9131132901e8a66a071a7b74a88.zip | |
checkpatch: warn on comparisons to jiffies
Comparing jiffies is almost always wrong and time_before and time_after
should be used instead.
Warn on any comparison to jiffies.
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>
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 576139a508a3..c274e1dc1e67 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3299,6 +3299,12 @@ sub process { } } +# check for comparisons of jiffies + if ($line =~ /\bjiffies\s*$Compare|$Compare\s*jiffies\b/) { + WARN("JIFFIES_COMPARISON", + "Comparing jiffies is almost always wrong; prefer time_after, time_before and friends\n" . $herecurr); + } + # warn about #ifdefs in C files # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) { # print "#ifdef in C files should be avoided\n"; |