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| author | Patrick Pannuto <ppannuto@codeaurora.org> | 2010-08-09 17:21:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-09 20:45:09 -0700 |
| commit | 09ef87255da0e005dd0ab39ca25714208cf29cb3 (patch) | |
| tree | e792086e6e088f08496a5fe03f8abca8d32b1c1b /scripts | |
| parent | 1a15a250862fda3fbdf8454cc7131e24de904e7c (diff) | |
| download | lwn-09ef87255da0e005dd0ab39ca25714208cf29cb3.tar.gz lwn-09ef87255da0e005dd0ab39ca25714208cf29cb3.zip | |
checkpatch: warn about unexpectedly long msleep's
As explained in Documentation/timers/timers-howto.txt, msleep's of < 20ms
may sleep for as long as 20ms. Caller's of msleep(1) or msleep(2), etc
are likely not to expect this quirky behavior - warn them.
Signed-off-by: Patrick Pannuto <ppannuto@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/checkpatch.pl | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 8b69af8a76f9..dd11bbe01338 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2592,6 +2592,13 @@ sub process { } } +# warn about unexpectedly long msleep's + if ($line =~ /\bmsleep\s*\((\d+)\);/) { + if ($1 < 20) { + WARN("msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt\n" . $line); + } + } + # warn about #ifdefs in C files # if ($line =~ /^.\s*\#\s*if(|n)def/ && ($realfile =~ /\.c$/)) { # print "#ifdef in C files should be avoided\n"; |