From 4a273195a551a27a9a3ebed072c8df16c853da7f Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Mon, 30 Jul 2012 14:41:20 -0700
Subject: [PATCH] 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>
---
scripts/checkpatch.pl | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
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)
--
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