btrfs: make btrfs_destroy_marked_extents() return void

Currently btrfs_destroy_marked_extents() is returning the value of the
last call to find_first_extent_bit(), which returns a value of 1 meaning
no more ranges found the dirty pages io tree. This value is useless to the
single caller of btrfs_destroy_marked_extents(), which ignores any return
value from btrfs_destroy_marked_extents(). This is because it's only used
in the transaction abort path, where we can't even deal with any errors
since we are in a critical situation already and cleanup of resources is
done in a best effort fashion.

So make btrfs_destroy_marked_extents() return void.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/disk-io.c

@@ -4716,21 +4716,16 @@ static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info)
 	spin_unlock(&fs_info->delalloc_root_lock);
 }
 
-static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info,
-					struct extent_io_tree *dirty_pages,
-					int mark)
+static void btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info,
+					 struct extent_io_tree *dirty_pages,
+					 int mark)
 {
-	int ret;
 	struct extent_buffer *eb;
 	u64 start = 0;
 	u64 end;
 
-	while (1) {
-		ret = find_first_extent_bit(dirty_pages, start, &start, &end,
-					    mark, NULL);
-		if (ret)
-			break;
-
+	while (!find_first_extent_bit(dirty_pages, start, &start, &end,
+				      mark, NULL)) {
 		clear_extent_bits(dirty_pages, start, end, mark);
 		while (start <= end) {
 			eb = find_extent_buffer(fs_info, start);
@@ -4746,8 +4741,6 @@ static int btrfs_destroy_marked_extents(struct btrfs_fs_info *fs_info,
 			free_extent_buffer_stale(eb);
 		}
 	}
-
-	return ret;
 }
 
 static int btrfs_destroy_pinned_extent(struct btrfs_fs_info *fs_info,