ecryptfs: simplify list initialization in ecryptfs_parse_packet_set()

In ecryptfs_parse_packet_set(),use LIST_HEAD() to declare and
initialize the 'auth_tok_list' list in one step instead of
using INIT_LIST_HEAD() separately.

No functional change.

Signed-off-by: Baolin Liu <liubaolin@kylinos.cn>
Signed-off-by: Tyler Hicks <code@tyhicks.com>

Author: murphy12138

fs/ecryptfs/keystore.c

@@ -1716,7 +1716,7 @@ int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
 	size_t i = 0;
 	size_t found_auth_tok;
 	size_t next_packet_is_auth_tok_packet;
-	struct list_head auth_tok_list;
+	LIST_HEAD(auth_tok_list);
 	struct ecryptfs_auth_tok *matching_auth_tok;
 	struct ecryptfs_auth_tok *candidate_auth_tok;
 	char *candidate_auth_tok_sig;
@@ -1729,7 +1729,6 @@ int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
 	struct key *auth_tok_key = NULL;
 	int rc = 0;
 
-	INIT_LIST_HEAD(&auth_tok_list);
 	/* Parse the header to find as many packets as we can; these will be
 	 * added the our &auth_tok_list */
 	next_packet_is_auth_tok_packet = 1;