btrfs: cleanup init for list in free-space-cache

o removed an unecessary INIT_LIST_HEAD after LIST_HEAD

o merge a declare & INIT_LIST_HEAD pair into one LIST_HEAD

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 80a3141..a719785 100644 (file)
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -651,15 +651,13 @@ static int __load_free_space_cache(struct btrfs_root *root, struct inode *inode,
        struct io_ctl io_ctl;
        struct btrfs_key key;
        struct btrfs_free_space *e, *n;
-       struct list_head bitmaps;
+       LIST_HEAD(bitmaps);
        u64 num_entries;
        u64 num_bitmaps;
        u64 generation;
        u8 type;
        int ret = 0;
 
-       INIT_LIST_HEAD(&bitmaps);
-
        /* Nothing in the space cache, goodbye */
        if (!i_size_read(inode))
                return 0;
@@ -2905,7 +2903,6 @@ int btrfs_find_space_cluster(struct btrfs_root *root,
        trace_btrfs_find_cluster(block_group, offset, bytes, empty_size,
                                 min_bytes);
 
-       INIT_LIST_HEAD(&bitmaps);
        ret = setup_cluster_no_bitmap(block_group, cluster, &bitmaps, offset,
                                      bytes + empty_size,
                                      cont1_bytes, min_bytes);