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rhashtable: Use head_hashfn instead of obj_raw_hashfn 

Now that we don't have cross-table hashes, we no longer need to
keep the entire hash value so all users of obj_raw_hashfn can
use head_hashfn instead.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2015-03-12 14:49:39 +11:00 committed by David S. Miller
parent 8d2b18793d
commit eca8493330
1 changed files with 5 additions and 7 deletions
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12
lib/rhashtable.c
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@ -403,7 +403,7 @@ static bool __rhashtable_insert(struct rhashtable *ht, struct rhash_head *obj,
rcu_read_lock();
old_tbl = rht_dereference_rcu(ht->tbl, ht);
hash = obj_raw_hashfn(ht, old_tbl, rht_obj(ht, obj));
hash = head_hashfn(ht, old_tbl, obj);
spin_lock_bh(bucket_lock(old_tbl, hash));
@ -415,7 +415,7 @@ static bool __rhashtable_insert(struct rhashtable *ht, struct rhash_head *obj,
*/
tbl = rht_dereference_rcu(ht->future_tbl, ht);
if (tbl != old_tbl) {
hash = obj_raw_hashfn(ht, tbl, rht_obj(ht, obj));
hash = head_hashfn(ht, tbl, obj);
spin_lock_nested(bucket_lock(tbl, hash), RHT_LOCK_NESTED);
}
@ -428,7 +428,6 @@ static bool __rhashtable_insert(struct rhashtable *ht, struct rhash_head *obj,
no_resize_running = tbl == old_tbl;
hash = rht_bucket_index(tbl, hash);
head = rht_dereference_bucket(tbl->buckets[hash], tbl, hash);
if (rht_is_a_nulls(head))
@ -444,11 +443,11 @@ static bool __rhashtable_insert(struct rhashtable *ht, struct rhash_head *obj,
exit:
if (tbl != old_tbl) {
hash = obj_raw_hashfn(ht, tbl, rht_obj(ht, obj));
hash = head_hashfn(ht, tbl, obj);
spin_unlock(bucket_lock(tbl, hash));
}
hash = obj_raw_hashfn(ht, old_tbl, rht_obj(ht, obj));
hash = head_hashfn(ht, old_tbl, obj);
spin_unlock_bh(bucket_lock(old_tbl, hash));
rcu_read_unlock();
@ -487,9 +486,8 @@ static bool __rhashtable_remove(struct rhashtable *ht,
unsigned hash;
bool ret = false;
hash = obj_raw_hashfn(ht, tbl, rht_obj(ht, obj));
hash = head_hashfn(ht, tbl, obj);
lock = bucket_lock(tbl, hash);
hash = rht_bucket_index(tbl, hash);
spin_lock_bh(lock);