bcache: add code comments for bch_btree_node_get() and __bch_btree_node_alloc()
[ Upstream commit 31f5b956a1
]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -972,6 +972,9 @@ err:
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*
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* The btree node will have either a read or a write lock held, depending on
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* level and op->lock.
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*
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* Note: Only error code or btree pointer will be returned, it is unncessary
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* for callers to check NULL pointer.
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*/
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struct btree *bch_btree_node_get(struct cache_set *c, struct btree_op *op,
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struct bkey *k, int level, bool write,
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@ -1070,6 +1073,10 @@ static void btree_node_free(struct btree *b)
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mutex_unlock(&b->c->bucket_lock);
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}
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/*
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* Only error code or btree pointer will be returned, it is unncessary for
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* callers to check NULL pointer.
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*/
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struct btree *__bch_btree_node_alloc(struct cache_set *c, struct btree_op *op,
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int level, bool wait,
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struct btree *parent)
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