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blk-mq: use struct_size() in kmalloc()

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Change struct size calculation to use struct_size()
to align with new recommended practices[1] which quotes:
"Another common case to avoid is calculating the size of a structure with
a trailing array of others structures, as in:

header = kzalloc(sizeof(*header) + count * sizeof(*header->item),
                 GFP_KERNEL);

Instead, use the helper:

header = kzalloc(struct_size(header, item, count), GFP_KERNEL);"

Signed-off-by: Mehdi Ben Hadj Khelifa <mehdi.benhadjkhelifa@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Mehdi Ben Hadj Khelifa 2025-10-18 22:38:13 +01:00 committed by Jens Axboe
parent d60055cf52
commit e5a82249d8
1 changed files with 1 additions and 2 deletions
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3
block/blk-mq-sched.c
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@ -466,8 +466,7 @@ struct elevator_tags *blk_mq_alloc_sched_tags(struct blk_mq_tag_set *set,
else
nr_tags = nr_hw_queues;
et = kmalloc(sizeof(struct elevator_tags) +
nr_tags * sizeof(struct blk_mq_tags *), gfp);
et = kmalloc(struct_size(et, tags, nr_tags), gfp);
if (!et)
return NULL;