From: Andreas Gruenbacher <agruenba@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Andreas Gruenbacher <agruenba@redhat.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Thomas Graf <tgraf@suug.ch>,
"David S. Miller" <davem@davemloft.net>,
rpeterso@redhat.com, cluster-devel@redhat.com,
netdev@vger.kernel.org
Subject: [PATCH] rhashtable: Add rhashtable_lookup_get_insert_fast
Date: Sat, 18 Mar 2017 00:36:15 +0100 [thread overview]
Message-ID: <1489793775-25152-1-git-send-email-agruenba@redhat.com> (raw)
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@redhat.com>
Acked-by: Herbert Xu <herbert@gondor.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
next reply other threads:[~2017-03-17 23:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-17 23:36 Andreas Gruenbacher [this message]
2017-03-22 0:52 ` [PATCH] rhashtable: Add rhashtable_lookup_get_insert_fast David Miller
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