Commit 691d77b6 authored by Andy Whitcroft's avatar Andy Whitcroft Committed by Linus Torvalds
Browse files

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: default avatarAndy Whitcroft <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 94e2959e
......@@ -2466,6 +2466,15 @@ sub process {
# 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
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