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checkpatch: add check for array allocator family argument order

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These array allocator family are sometimes misused with the first and
second arguments switched.

Same issue with calloc, kvcalloc, kvmalloc_array etc.

Bleat if sizeof is the first argument.

Link: https://lore.kernel.org/lkml/5374345c-7973-6a3c-d559-73bf4ac15079@redhat.com/
Link: https://lkml.kernel.org/r/20221104070523.60296-1-liaochang1@huawei.com
Signed-off-by: Liao Chang <liaochang1@huawei.com>
Acked-by: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Bagas Sanjaya <bagasdotme@gmail.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liao Chang 2022-11-04 15:05:23 +08:00 committed by Andrew Morton
parent d04bb0852b
commit 3965292ad0
1 changed files with 1 additions and 1 deletions
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2
scripts/checkpatch.pl
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@ -7146,7 +7146,7 @@ sub process {
}
# check for alloc argument mismatch
if ($line =~ /\b((?:devm_)?(?:kcalloc|kmalloc_array))\s*\(\s*sizeof\b/) {
if ($line =~ /\b((?:devm_)?((?:k|kv)?(calloc|malloc_array)(?:_node)?))\s*\(\s*sizeof\b/) {
WARN("ALLOC_ARRAY_ARGS",
"$1 uses number as first arg, sizeof is generally wrong\n" . $herecurr);
}