eCryptfs: remove unnecessary variable initializations

Andrew Morton wrote:
> >       struct mutex *tfm_mutex = NULL;
>
> This initialisation looks like it's here to kill bogus gcc warning
> (if it is, it should have been commented).  Please investigate
> uninitialized_var() and __maybe_unused sometime.

Remove some unnecessary variable initializations. There may be a few
more such intializations remaining in the code base; a future patch
will take care of those.
Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ecryptfs/keystore.c

@@ -1009,7 +1009,7 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
 {
 	struct scatterlist dst_sg;
 	struct scatterlist src_sg;
-	struct mutex *tfm_mutex = NULL;
+	struct mutex *tfm_mutex;
 	struct blkcipher_desc desc = {
 		.flags = CRYPTO_TFM_REQ_MAY_SLEEP
 	};
@@ -1123,8 +1123,8 @@ int ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
 	size_t found_auth_tok;
 	size_t next_packet_is_auth_tok_packet;
 	struct list_head auth_tok_list;
-	struct ecryptfs_auth_tok *matching_auth_tok = NULL;
-	struct ecryptfs_auth_tok *candidate_auth_tok = NULL;
+	struct ecryptfs_auth_tok *matching_auth_tok;
+	struct ecryptfs_auth_tok *candidate_auth_tok;
 	char *candidate_auth_tok_sig;
 	size_t packet_size;
 	struct ecryptfs_auth_tok *new_auth_tok;