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Diffstat (limited to 'drivers/md/dm-snap.c')
| -rw-r--r-- | drivers/md/dm-snap.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index cc2f14b42ba4..731e1f5bd895 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -2302,6 +2302,13 @@ static int origin_map(struct dm_target *ti, struct bio *bio) return do_origin(o->dev, bio); } +static long origin_direct_access(struct dm_target *ti, sector_t sector, + void __pmem **kaddr, pfn_t *pfn, long size) +{ + DMWARN("device does not support dax."); + return -EIO; +} + /* * Set the target "max_io_len" field to the minimum of all the snapshots' * chunk sizes. @@ -2361,6 +2368,7 @@ static struct target_type origin_target = { .postsuspend = origin_postsuspend, .status = origin_status, .iterate_devices = origin_iterate_devices, + .direct_access = origin_direct_access, }; static struct target_type snapshot_target = { |