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| author | Christoph Hellwig <hch@lst.de> | 2007-09-10 20:02:32 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-09-10 20:02:32 -0400 |
| commit | b06355f0fe04a62d08238438654ec453e05304ba (patch) | |
| tree | 03256315e789dc21d2721fb5484ef50b199c9b17 /fs/btrfs/extent_map.c | |
| parent | d396c6f554d182b7bce4e2bb2acb47f80430c05f (diff) | |
| download | linux-stable-b06355f0fe04a62d08238438654ec453e05304ba.tar.gz linux-stable-b06355f0fe04a62d08238438654ec453e05304ba.tar.bz2 linux-stable-b06355f0fe04a62d08238438654ec453e05304ba.zip | |
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: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.c')
| -rw-r--r-- | fs/btrfs/extent_map.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index ff2b1dd25bf9..162766773a32 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -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 { |