checkpatch: Add check for kcalloc argument order
kcalloc is sometimes misused with the first and second arguments switched.
Same issue with kmalloc_array too.
Bleat if sizeof is the first argument
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 2c50eb4..7b40a3f 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3476,6 +3476,12 @@
"unnecessary cast may hide bugs, see http://c-faq.com/malloc/mallocnocast.html\n" . $herecurr);
}
+# check for alloc argument mismatch
+ if ($line =~ /\b(kcalloc|kmalloc_array)\s*\(\s*sizeof\b/) {
+ WARN("ALLOC_ARRAY_ARGS",
+ "$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr);
+ }
+
# check for multiple semicolons
if ($line =~ /;\s*;\s*$/) {
WARN("ONE_SEMICOLON",
