write_lock(&key->lock); key->flags |= KEY_FLAG_REVOKED; write_unlock(&key->lock); 
set_bit(KEY_FLAG_REVOKED, &key->flags); 
void key_revoke(struct key *key){	key_check(key);	/* make sure no one's trying to change or use the key when we mark	 * it */	down_write(&key->sem);	write_lock(&key->lock);	key->flags |= KEY_FLAG_REVOKED;	write_unlock(&key->lock);	up_write(&key->sem);} /* end key_revoke() */
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/76d8aeabfeb1c42641a81c44280177b9a08670d8/key.c/clean/security/keys/key.c