ecryptfs: use kzfree()

Use kzfree() instead of memset() + kfree().

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ecryptfs/keystore.c

@@ -740,8 +740,7 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
 out_release_free_unlock:
 	crypto_free_hash(s->hash_desc.tfm);
 out_free_unlock:
-	memset(s->block_aligned_filename, 0, s->block_aligned_filename_size);
-	kfree(s->block_aligned_filename);
+	kzfree(s->block_aligned_filename);
 out_unlock:
 	mutex_unlock(s->tfm_mutex);
 out:

fs/ecryptfs/messaging.c

@@ -291,8 +291,7 @@ int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon)
 	if (daemon->user_ns)
 		put_user_ns(daemon->user_ns);
 	mutex_unlock(&daemon->mux);
-	memset(daemon, 0, sizeof(*daemon));
-	kfree(daemon);
+	kzfree(daemon);
 out:
 	return rc;
 }