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rhashtable: involve rhashtable_lookup_insert routine

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Involve a new function called rhashtable_lookup_insert() which makes
lookup and insertion atomic under bucket lock protection, helping us
avoid to introduce an extra lock when we search and insert an object
into hash table.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue
2015-01-07 13:41:54 +08:00
committed by David S. Miller
parent 54c5b7d311
commit db30485408
2 changed files with 83 additions and 15 deletions
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include/linux/rhashtable.h
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@@ -168,6 +168,7 @@ int rhashtable_shrink(struct rhashtable *ht);
void *rhashtable_lookup(struct rhashtable *ht, const void *key);
void *rhashtable_lookup_compare(struct rhashtable *ht, const void *key,
bool (*compare)(void *, void *), void *arg);
bool rhashtable_lookup_insert(struct rhashtable *ht, struct rhash_head *obj);
void rhashtable_destroy(struct rhashtable *ht);