btrfs: use btrfs_for_each_slot in find_first_block_group

This function can be simplified by refactoring to use the new iterator
macro.  No functional changes.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Signed-off-by: Gabriel Niebler <gniebler@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 0dd6de9..aee2171 100644 (file)
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1692,35 +1692,13 @@ static int find_first_block_group(struct btrfs_fs_info *fs_info,
        struct btrfs_root *root = btrfs_block_group_root(fs_info);
        int ret;
        struct btrfs_key found_key;
-       struct extent_buffer *leaf;
-       int slot;
-
-       ret = btrfs_search_slot(NULL, root, key, path, 0, 0);
-       if (ret < 0)
-               return ret;
-
-       while (1) {
-               slot = path->slots[0];
-               leaf = path->nodes[0];
-               if (slot >= btrfs_header_nritems(leaf)) {
-                       ret = btrfs_next_leaf(root, path);
-                       if (ret == 0)
-                               continue;
-                       if (ret < 0)
-                               goto out;
-                       break;
-               }
-               btrfs_item_key_to_cpu(leaf, &found_key, slot);
 
+       btrfs_for_each_slot(root, key, &found_key, path, ret) {
                if (found_key.objectid >= key->objectid &&
                    found_key.type == BTRFS_BLOCK_GROUP_ITEM_KEY) {
-                       ret = read_bg_from_eb(fs_info, &found_key, path);
-                       break;
+                       return read_bg_from_eb(fs_info, &found_key, path);
                }
-
-               path->slots[0]++;
        }
-out:
        return ret;
 }