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Subject[PATCH] dm: initialize md->dax_dev only with CONFIG_DAX_DRIVER enabled
Date
md->dax_dev is NULL default and there is no need to process it
without CONFIG_DAX_DRIVER configured.

Signed-off-by: Peng Wang <rocking@whu.edu.cn>
---
drivers/md/dm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 043f0761e4a0..418a51cf194c 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1972,8 +1972,8 @@ static struct mapped_device *alloc_dev(int minor)
dax_dev = alloc_dax(md, md->disk->disk_name, &dm_dax_ops);
if (!dax_dev)
goto bad;
+ md->dax_dev = dax_dev;
}
- md->dax_dev = dax_dev;

add_disk_no_queue_reg(md->disk);
format_dev_t(md->name, MKDEV(_major, minor));
--
2.19.1
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