From 94dbb63117e82253c9592816aa4465f0a9c94850 Mon Sep 17 00:00:00 2001
From: Toshi Kani <toshi.kani@hpe.com>
Date: Sat, 15 Sep 2018 21:23:41 -0400
Subject: [PATCH] ext4, dax: add ext4_bmap to ext4_dax_aops
Git-commit: 94dbb63117e82253c9592816aa4465f0a9c94850
Patch-mainline: v4.19-rc5
References: bsc#1104888

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
Acked-by: Jan Kara <jack@suse.cz>

---
 fs/ext4/inode.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 723058bfe43b..5be07f64ae0a 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3951,6 +3951,7 @@ static const struct address_space_operations ext4_dax_aops = {
 	.writepages		= ext4_dax_writepages,
 	.direct_IO		= noop_direct_IO,
 	.set_page_dirty		= noop_set_page_dirty,
+	.bmap			= ext4_bmap,
 	.invalidatepage		= noop_invalidatepage,
 };
 
-- 
2.16.4