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authorAndy Whitcroft <apw@shadowen.org>2009-01-06 14:41:16 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 15:59:15 -0800
commit691d77b6b85c20e4166bafd12bd0131b28f95a16 (patch)
treeb7c8950fadd6d3cf3a949d3977597cd0388544e8 /scripts/checkpatch.pl
parent94e2959e7a6a4ef0969932c30349ce6f4469a3cf (diff)
downloadlwn-691d77b6b85c20e4166bafd12bd0131b28f95a16.tar.gz
lwn-691d77b6b85c20e4166bafd12bd0131b28f95a16.zip
checkpatch: add checks for in_atomic()
in_atomic() is not for driver use so report any such use as an ERROR. Also in_atomic() is often used to determine if we may sleep, but it is not reliable in this use model therefore strongly discourage its use. Signed-off-by: Andy Whitcroft <apw@shadowen.org> 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.pl9
1 files changed, 9 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index f88bb3e21cda..826cdbac0114 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2466,6 +2466,15 @@ sub process {
last;
}
}
+
+# whine mightly about in_atomic
+ if ($line =~ /\bin_atomic\s*\(/) {
+ if ($realfile =~ m@^drivers/@) {
+ ERROR("do not use in_atomic in drivers\n" . $herecurr);
+ } else {
+ WARN("use of in_atomic() is incorrect outside core kernel code\n" . $herecurr);
+ }
+ }
}
# If we have no input at all, then there is nothing to report on