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bcache: add code comments for bch_btree_node_get() and __bch_btree_node_alloc()

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This patch adds code comments to bch_btree_node_get() and
__bch_btree_node_alloc() that NULL pointer will not be returned and it
is unnecessary to check NULL pointer by the callers of these routines.

Signed-off-by: Coly Li <colyli@suse.de>
Link: https://lore.kernel.org/r/20231120052503.6122-10-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Coly Li 2023-11-20 13:25:02 +08:00 committed by Jens Axboe
parent f72f4312d4
commit 31f5b956a1
1 changed files with 7 additions and 0 deletions
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7
drivers/md/bcache/btree.c
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@ -1000,6 +1000,9 @@ err:
*
* The btree node will have either a read or a write lock held, depending on
* level and op->lock.
*
* Note: Only error code or btree pointer will be returned, it is unncessary
* for callers to check NULL pointer.
*/
struct btree *bch_btree_node_get(struct cache_set *c, struct btree_op *op,
struct bkey *k, int level, bool write,
@ -1111,6 +1114,10 @@ retry:
mutex_unlock(&b->c->bucket_lock);
}
/*
* Only error code or btree pointer will be returned, it is unncessary for
* callers to check NULL pointer.
*/
struct btree *__bch_btree_node_alloc(struct cache_set *c, struct btree_op *op,
int level, bool wait,
struct btree *parent)