btrfs: squash lines for simple wrapper functions

Remove unneeded variables and assignments.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/check-integrity.c

@@ -2849,11 +2849,8 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
 static struct btrfsic_dev_state *btrfsic_dev_state_lookup(
 		struct block_device *bdev)
 {
-	struct btrfsic_dev_state *ds;
-
-	ds = btrfsic_dev_state_hashtable_lookup(bdev,
+	return btrfsic_dev_state_hashtable_lookup(bdev,
 						  &btrfsic_dev_state_hashtable);
-	return ds;
 }
 
 int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)

fs/btrfs/ctree.c

@@ -45,9 +45,7 @@ static int tree_mod_log_free_eb(struct btrfs_fs_info *fs_info,
 
 struct btrfs_path *btrfs_alloc_path(void)
 {
-	struct btrfs_path *path;
-	path = kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS);
-	return path;
+	return kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS);
 }
 
 /*

fs/btrfs/delayed-inode.c

@@ -385,11 +385,8 @@ static struct btrfs_delayed_item *__btrfs_lookup_delayed_insertion_item(
 					struct btrfs_delayed_node *delayed_node,
 					struct btrfs_key *key)
 {
-	struct btrfs_delayed_item *item;
-
-	item = __btrfs_lookup_delayed_item(&delayed_node->ins_root, key,
+	return __btrfs_lookup_delayed_item(&delayed_node->ins_root, key,
 					   NULL, NULL);
-	return item;
 }
 
 static int __btrfs_add_delayed_item(struct btrfs_delayed_node *delayed_node,

fs/btrfs/extent-tree.c

@@ -730,11 +730,7 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
 static struct btrfs_block_group_cache *
 btrfs_lookup_first_block_group(struct btrfs_fs_info *info, u64 bytenr)
 {
-	struct btrfs_block_group_cache *cache;
-
-	cache = block_group_cache_tree_search(info, bytenr, 0);
-
-	return cache;
+	return block_group_cache_tree_search(info, bytenr, 0);
 }
 
 /*
@@ -744,11 +740,7 @@ struct btrfs_block_group_cache *btrfs_lookup_block_group(
 						 struct btrfs_fs_info *info,
 						 u64 bytenr)
 {
-	struct btrfs_block_group_cache *cache;
-
-	cache = block_group_cache_tree_search(info, bytenr, 1);
-
-	return cache;
+	return block_group_cache_tree_search(info, bytenr, 1);
 }
 
 static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,

fs/btrfs/send.c

@@ -4398,12 +4398,8 @@ static int process_new_xattr(struct send_ctx *sctx)
 
 static int process_deleted_xattr(struct send_ctx *sctx)
 {
-	int ret;
-
-	ret = iterate_dir_item(sctx->parent_root, sctx->right_path,
+	return iterate_dir_item(sctx->parent_root, sctx->right_path,
 				sctx->cmp_key, __process_deleted_xattr, sctx);
-
-	return ret;
 }
 
 struct find_xattr_ctx {