From 36ec19390effc9131132901e8a66a071a7b74a88 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Wed, 3 Jul 2013 15:05:25 -0700 Subject: 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/checkpatch.pl | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'scripts/checkpatch.pl') 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"; -- cgit v1.2.3-55-g7522