4.18-stable review patch. If anyone has any objections, please let me know.
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From: Toshi Kani toshi.kani@hpe.com
commit 94dbb63117e82253c9592816aa4465f0a9c94850 upstream.
Ext4 mount path calls .bmap to the journal inode. This currently works for the DAX mount case because ext4_iget() always set 'ext4_da_aops' to any regular files.
In preparation to fix ext4_iget() to set 'ext4_dax_aops' for ext4 DAX files, add ext4_bmap() to 'ext4_dax_aops', since bmap works for DAX inodes.
Fixes: 5f0663bb4a64 ("ext4, dax: introduce ext4_dax_aops") Signed-off-by: Toshi Kani toshi.kani@hpe.com Signed-off-by: Theodore Ts'o tytso@mit.edu Suggested-by: Jan Kara jack@suse.cz Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/ext4/inode.c | 1 + 1 file changed, 1 insertion(+)
--- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3951,6 +3951,7 @@ static const struct address_space_operat .writepages = ext4_dax_writepages, .direct_IO = noop_direct_IO, .set_page_dirty = noop_set_page_dirty, + .bmap = ext4_bmap, .invalidatepage = noop_invalidatepage, };