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Date: Sat, 18 Mar 2017 00:36:15 +0100 From: Andreas Gruenbacher <agruenba@...hat.com> To: linux-kernel@...r.kernel.org Cc: Andreas Gruenbacher <agruenba@...hat.com>, Herbert Xu <herbert@...dor.apana.org.au>, Thomas Graf <tgraf@...g.ch>, "David S. Miller" <davem@...emloft.net>, rpeterso@...hat.com, cluster-devel@...hat.com, netdev@...r.kernel.org Subject: [PATCH] rhashtable: Add rhashtable_lookup_get_insert_fast Add rhashtable_lookup_get_insert_fast for fixed keys, similar to rhashtable_lookup_get_insert_key for explicit keys. Signed-off-by: Andreas Gruenbacher <agruenba@...hat.com> Acked-by: Herbert Xu <herbert@...dor.apana.org.au> --- include/linux/rhashtable.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h index 092292b..e507290 100644 --- a/include/linux/rhashtable.h +++ b/include/linux/rhashtable.h @@ -916,6 +916,28 @@ static inline int rhashtable_lookup_insert_fast( } /** + * rhashtable_lookup_get_insert_fast - lookup and insert object into hash table + * @ht: hash table + * @obj: pointer to hash head inside object + * @params: hash table parameters + * + * Just like rhashtable_lookup_insert_fast(), but this function returns the + * object if it exists, NULL if it did not and the insertion was successful, + * and an ERR_PTR otherwise. + */ +static inline void *rhashtable_lookup_get_insert_fast( + struct rhashtable *ht, struct rhash_head *obj, + const struct rhashtable_params params) +{ + const char *key = rht_obj(ht, obj); + + BUG_ON(ht->p.obj_hashfn); + + return __rhashtable_insert_fast(ht, key + ht->p.key_offset, obj, params, + false); +} + +/** * rhashtable_lookup_insert_key - search and insert object to hash table * with explicit key * @ht: hash table -- 2.7.4
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