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authorPatrick Pannuto <ppannuto@codeaurora.org>2010-08-10 00:21:02 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-10 03:45:09 (GMT)
commit09ef87255da0e005dd0ab39ca25714208cf29cb3 (patch)
treee792086e6e088f08496a5fe03f8abca8d32b1c1b /scripts/checkpatch.pl
parent1a15a250862fda3fbdf8454cc7131e24de904e7c (diff)
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/checkpatch.pl')
-rwxr-xr-xscripts/checkpatch.pl7
1 files changed, 7 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 8b69af8..dd11bbe 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";

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