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| author | Joe Perches <joe@perches.com> | 2012-07-30 14:41:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-30 17:25:17 -0700 |
| commit | 4a273195a551a27a9a3ebed072c8df16c853da7f (patch) | |
| tree | f6dd0354f66679adea5cab8aab0a620a6832e181 /scripts | |
| parent | ce0338df3c9a43e709b8a478265b32b9edcc7ccc (diff) | |
| download | linux-4a273195a551a27a9a3ebed072c8df16c853da7f.tar.gz linux-4a273195a551a27a9a3ebed072c8df16c853da7f.tar.bz2 linux-4a273195a551a27a9a3ebed072c8df16c853da7f.zip | |
checkpatch: check usleep_range() arguments
usleep_range() shouldn't use the same args for min and max.
Report it when it happens and when both args are decimal and min > max.
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Yuval Mintz <yuvalmin@broadcom.com>
Cc: 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')
| -rwxr-xr-x | scripts/checkpatch.pl | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 3e04f80375de..4bad5700670a 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3313,6 +3313,22 @@ sub process { } } +# check usleep_range arguments + if ($^V && $^V ge 5.10.0 && + defined $stat && + $stat =~ /^\+(?:.*?)\busleep_range\s*\(\s*($FuncArg)\s*,\s*($FuncArg)\s*\)/) { + my $min = $1; + my $max = $7; + if ($min eq $max) { + WARN("USLEEP_RANGE", + "usleep_range should not use min == max args; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n"); + } elsif ($min =~ /^\d+$/ && $max =~ /^\d+$/ && + $min > $max) { + WARN("USLEEP_RANGE", + "usleep_range args reversed, use min then max; see Documentation/timers/timers-howto.txt\n" . "$here\n$stat\n"); + } + } + # check for new externs in .c files. if ($realfile =~ /\.c$/ && defined $stat && $stat =~ /^.\s*(?:extern\s+)?$Type\s+($Ident)(\s*)\(/s) |