kernel/include/linux/rhashtable.h
/**
 * rhashtable_lookup_fast - search hash table, without RCU read lock
 * @ht:		hash table
 * @key:	the pointer to the key
 * @params:	hash table parameters
 *
 * Computes the hash value for the key and traverses the bucket chain looking
 * for a entry with an identical key. The first matching entry is returned.
 *
 * Only use this function when you have other mechanisms guaranteeing
 * that the object won't go away after the RCU read lock is released.
 *
 * Returns the first entry on which the compare function returned true.
 */
search hash table, without RCU read lock
@ht:         hash table
@key:        the pointer to the key
@params:     hash table parameters

Computes the hash value for the key and traverses the bucket chain looking
for a entry with an identical key. The first matching entry is returned.

Only use this function when you have other mechanisms guaranteeing
that the object won't go away after the RCU read lock is released.

Returns the first entry on which the compare function returned true.
search hash table without RCU read lock @ht : hash table @key : the pointer to the key @params : hash table parameters Computes the hash value for the key and traverses the bucket chain looking for a entry with an identical key . The first matching entry is returned . Only use this function when you have other mechanisms guaranteeing that the object won ' t go away after the RCU read lock is released . Returns the first entry on which the compare function returned true .
static inline void *rhashtable_lookup_fast(
	struct rhashtable *ht, const void *key,
	const struct rhashtable_params params)
{
	void *obj;
	rcu_read_lock();
	obj = rhashtable_lookup(ht, key, params);
	rcu_read_unlock();
	return obj;
}
static inline void * rhashtable_lookup_fast ( struct rhashtable * ht , const void * key , const struct rhashtable_params params ) { void * obj ; rcu_read_lock ( ) ; obj = rhashtable_lookup ( ht , key , params ) ; rcu_read_unlock ( ) ; return obj ; }
rhashtable_lookup_fast - search hash table, without RCU read lock
 @ht:         hash table
 @key:        the pointer to the key
 @params:     hash table parameters
rhashtable_lookup_fast - search hash table without RCU read lock @ht : hash table @key : the pointer to the key @params : hash table parameters