Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b06355f0 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by David Woodhouse
Browse files

Btrfs: [PATCH] extent_map: make the writepage_io hook optional 



The writepage_io is not mandatory, e.g. my port of xfs to the extent_map
code does not have one for now.  So handle a NULL pointer gracefully
here.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent d396c6f5

fs/btrfs/extent_map.c

+6 −1
Original line number Diff line number Diff line
@@ -1607,7 +1607,12 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page, 
			continue;

		}

		clear_extent_dirty(tree, cur, cur + iosize - 1, GFP_NOFS);

		ret = tree->ops->writepage_io_hook(page, cur, cur + iosize - 1);

		if (tree->ops && tree->ops->writepage_io_hook) {

			ret = tree->ops->writepage_io_hook(page, cur,

						cur + iosize - 1);

		} else {

			ret = 0;

		}

		if (ret)

			SetPageError(page);

		else {