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block: null_blk: Use the bitmap API to allocate bitmaps 

Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.

It is less verbose and it improves the semantic.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/7c4d3116ba843fc4a8ae557dd6176352a6cd0985.1656864320.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christophe JAILLET 2022-07-03 18:05:43 +02:00 committed by Jens Axboe
parent 9e26728b5f
commit eb25ad8036
1 changed files with 3 additions and 4 deletions
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7
drivers/block/null_blk/main.c
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@ -1655,7 +1655,7 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx,
static void cleanup_queue(struct nullb_queue *nq)
{
kfree(nq->tag_map);
bitmap_free(nq->tag_map);
kfree(nq->cmds);
}
@ -1782,14 +1782,13 @@ static const struct block_device_operations null_rq_ops = {
static int setup_commands(struct nullb_queue *nq)
{
struct nullb_cmd *cmd;
int i, tag_size;
int i;
nq->cmds = kcalloc(nq->queue_depth, sizeof(*cmd), GFP_KERNEL);
if (!nq->cmds)
return -ENOMEM;
tag_size = ALIGN(nq->queue_depth, BITS_PER_LONG) / BITS_PER_LONG;
nq->tag_map = kcalloc(tag_size, sizeof(unsigned long), GFP_KERNEL);
nq->tag_map = bitmap_zalloc(nq->queue_depth, GFP_KERNEL);
if (!nq->tag_map) {
kfree(nq->cmds);
return -ENOMEM;