[PATCH] btrfs: Cleanup btrfs_destroy_delayed_refs()

[Qu Wenruo <wqu@xxxxxxxx>]

This patches cleans up btrfs_destroy_delayed_refs() by:
- Remove the forward declaration
  The caller comes after the implementation, no need to do forward
  declaration.

- Remove the @fs_info parameter
  @fs_info can be extracted from @trans parameter.

- Make it return void
  Again, no failure pattern.

Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
---
 fs/btrfs/disk-io.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 6fe9197f6ee4..d83298570bdb 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -54,8 +54,6 @@
 static const struct extent_io_ops btree_extent_io_ops;
 static void end_workqueue_fn(struct btrfs_work *work);
 static void btrfs_destroy_ordered_extents(struct btrfs_root *root);
-static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
-				      struct btrfs_fs_info *fs_info);
 static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root);
 static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info,
 					struct extent_io_tree *dirty_pages,
@@ -4224,13 +4222,12 @@ static void btrfs_destroy_all_ordered_extents(struct btrfs_fs_info *fs_info)
 	btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
 }
 
-static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
-				      struct btrfs_fs_info *fs_info)
+static void btrfs_destroy_delayed_refs(struct btrfs_transaction *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct rb_node *node;
 	struct btrfs_delayed_ref_root *delayed_refs;
 	struct btrfs_delayed_ref_node *ref;
-	int ret = 0;
 
 	delayed_refs = &trans->delayed_refs;
 
@@ -4238,7 +4235,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
 	if (atomic_read(&delayed_refs->num_entries) == 0) {
 		spin_unlock(&delayed_refs->lock);
 		btrfs_info(fs_info, "delayed_refs has NO entry");
-		return ret;
+		return;
 	}
 
 	while ((node = rb_first_cached(&delayed_refs->href_root)) != NULL) {
@@ -4281,8 +4278,6 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
 	}
 
 	spin_unlock(&delayed_refs->lock);
-
-	return ret;
 }
 
 static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
@@ -4488,7 +4483,7 @@ void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
 	ASSERT(list_empty(&cur_trans->dirty_bgs));
 	ASSERT(list_empty(&cur_trans->io_bgs));
 
-	btrfs_destroy_delayed_refs(cur_trans, fs_info);
+	btrfs_destroy_delayed_refs(cur_trans);
 
 	cur_trans->state = TRANS_STATE_COMMIT_START;
 	wake_up(&fs_info->transaction_blocked_wait);
-- 
2.21.0