From 00697eed386d57c5267aad5b8343f027b10da0c0 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Sun, 20 Nov 2016 20:47:07 -0500 Subject: [PATCH] ext2: use iomap_zero_range() for zeroing truncated page in DAX path Currently the last user of ext2_get_blocks() for DAX inodes was dax_truncate_page(). Convert that to iomap_zero_range() so that all DAX IO uses the iomap path. Reviewed-by: Ross Zwisler Signed-off-by: Jan Kara Signed-off-by: Theodore Ts'o --- fs/ext2/inode.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 41b8b44..046b642 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -850,6 +850,9 @@ struct iomap_ops ext2_iomap_ops = { .iomap_begin = ext2_iomap_begin, .iomap_end = ext2_iomap_end, }; +#else +/* Define empty ops for !CONFIG_FS_DAX case to avoid ugly ifdefs */ +struct iomap_ops ext2_iomap_ops; #endif /* CONFIG_FS_DAX */ int ext2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, @@ -1293,9 +1296,11 @@ static int ext2_setsize(struct inode *inode, loff_t newsize) inode_dio_wait(inode); - if (IS_DAX(inode)) - error = dax_truncate_page(inode, newsize, ext2_get_block); - else if (test_opt(inode->i_sb, NOBH)) + if (IS_DAX(inode)) { + error = iomap_zero_range(inode, newsize, + PAGE_ALIGN(newsize) - newsize, NULL, + &ext2_iomap_ops); + } else if (test_opt(inode->i_sb, NOBH)) error = nobh_truncate_page(inode->i_mapping, newsize, ext2_get_block); else -- 2.7.4