btrfs: create btrfs_reclaim_block_groups()

Create a function btrfs_reclaim_block_groups() that gets called from the
block-group reclaim worker.

This allows creating synchronous block_group reclaim later on.

Reviewed-by: Damien Le Moal <[email protected]>
Reviewed-by: Boris Burkov <[email protected]>
Signed-off-by: Johannes Thumshirn <[email protected]>
Signed-off-by: David Sterba <[email protected]>

Author: morbidrsa

fs/btrfs/block-group.c

@@ -2040,10 +2040,8 @@ static int btrfs_reclaim_block_group(struct btrfs_block_group *bg)
 	return ret;
 }
 
-void btrfs_reclaim_bgs_work(struct work_struct *work)
+static void btrfs_reclaim_block_groups(struct btrfs_fs_info *fs_info)
 {
-	struct btrfs_fs_info *fs_info =
-		container_of(work, struct btrfs_fs_info, reclaim_bgs_work);
 	struct btrfs_block_group *bg;
 	struct btrfs_space_info *space_info;
 	LIST_HEAD(retry_list);
@@ -2111,6 +2109,14 @@ void btrfs_reclaim_bgs_work(struct work_struct *work)
 	btrfs_exclop_finish(fs_info);
 }
 
+void btrfs_reclaim_bgs_work(struct work_struct *work)
+{
+	struct btrfs_fs_info *fs_info =
+		container_of(work, struct btrfs_fs_info, reclaim_bgs_work);
+
+	btrfs_reclaim_block_groups(fs_info);
+}
+
 void btrfs_reclaim_bgs(struct btrfs_fs_info *fs_info)
 {
 	btrfs_reclaim_sweep(fs_info);