btrfs: remove unnecessary fs_info argument from btrfs_add_block_group_cache()

The fs_info can be taken from the given block group, so there is no need
to pass it as an argument. Also rename the local variable from 'info' to
'fs_info' which is more widely used, more clear and to be more consistent.

Signed-off-by: Filipe Manana <[email protected]>
Reviewed-by: David Sterba <[email protected]>
Signed-off-by: David Sterba <[email protected]>

Author: fdmanana

fs/btrfs/block-group.c

@@ -191,21 +191,21 @@ static int btrfs_bg_start_cmp(const struct rb_node *new,
 /*
  * This adds the block group to the fs_info rb tree for the block group cache
  */
-static int btrfs_add_block_group_cache(struct btrfs_fs_info *info,
-				       struct btrfs_block_group *block_group)
+static int btrfs_add_block_group_cache(struct btrfs_block_group *block_group)
 {
+	struct btrfs_fs_info *fs_info = block_group->fs_info;
 	struct rb_node *exist;
 	int ret = 0;
 
 	ASSERT(block_group->length != 0);
 
-	write_lock(&info->block_group_cache_lock);
+	write_lock(&fs_info->block_group_cache_lock);
 
 	exist = rb_find_add_cached(&block_group->cache_node,
-			&info->block_group_cache_tree, btrfs_bg_start_cmp);
+			&fs_info->block_group_cache_tree, btrfs_bg_start_cmp);
 	if (exist)
 		ret = -EEXIST;
-	write_unlock(&info->block_group_cache_lock);
+	write_unlock(&fs_info->block_group_cache_lock);
 
 	return ret;
 }
@@ -2438,7 +2438,7 @@ static int read_one_block_group(struct btrfs_fs_info *info,
 			goto error;
 	}
 
-	ret = btrfs_add_block_group_cache(info, cache);
+	ret = btrfs_add_block_group_cache(cache);
 	if (ret) {
 		btrfs_remove_free_space_cache(cache);
 		goto error;
@@ -2487,7 +2487,7 @@ static int fill_dummy_bgs(struct btrfs_fs_info *fs_info)
 		bg->cached = BTRFS_CACHE_FINISHED;
 		bg->used = map->chunk_len;
 		bg->flags = map->type;
-		ret = btrfs_add_block_group_cache(fs_info, bg);
+		ret = btrfs_add_block_group_cache(bg);
 		/*
 		 * We may have some valid block group cache added already, in
 		 * that case we skip to the next one.
@@ -2914,7 +2914,7 @@ struct btrfs_block_group *btrfs_make_block_group(struct btrfs_trans_handle *tran
 	cache->space_info = btrfs_find_space_info(fs_info, cache->flags);
 	ASSERT(cache->space_info);
 
-	ret = btrfs_add_block_group_cache(fs_info, cache);
+	ret = btrfs_add_block_group_cache(cache);
 	if (ret) {
 		btrfs_remove_free_space_cache(cache);
 		btrfs_put_block_group(cache);