Commit f3156df9 authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba
Browse files

btrfs: make lock_extent_buffer_for_io() to be subpage compatible 



For subpage metadata, we don't use page locking at all.  So just skip
the page locking part for subpage.  The rest of the function can be
reused.

Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 35b6ddfa

fs/btrfs/extent_io.c

+7 −1
Original line number Diff line number Diff line
@@ -3967,7 +3967,13 @@ static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb 


	btrfs_tree_unlock(eb);



	if (!ret)

	/*

	 * Either we don't need to submit any tree block, or we're submitting

	 * subpage eb.

	 * Subpage metadata doesn't use page locking at all, so we can skip

	 * the page locking.

	 */

	if (!ret || fs_info->sectorsize < PAGE_SIZE)

		return ret;



	num_pages = num_extent_pages(eb);