diff options
Diffstat (limited to 'fs/ext2')
| -rw-r--r-- | fs/ext2/inode.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index d5c7d09919f3..303ae2bb269a 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -733,6 +733,16 @@ static int ext2_get_blocks(struct inode *inode, } if (IS_DAX(inode)) { + int i; + + /* + * We must unmap blocks before zeroing so that writeback cannot + * overwrite zeros with stale data from block device page cache. + */ + for (i = 0; i < count; i++) { + unmap_underlying_metadata(inode->i_sb->s_bdev, + le32_to_cpu(chain[depth-1].key) + i); + } /* * block must be initialised before we put it in the tree * so that it's not found by another thread before it's |