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checkpatch: warn on comparisons to jiffies

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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>
This commit is contained in:
Joe Perches 2013-07-03 15:05:25 -07:00 committed by Linus Torvalds
parent a605e32ebd
commit 36ec19390e
1 changed files with 6 additions and 0 deletions
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6
scripts/checkpatch.pl
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@ -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";