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authorMikulas Patocka <mpatocka@redhat.com>2019-02-27 12:02:05 -0500
committerMike Snitzer <snitzer@redhat.com>2019-03-05 14:53:52 -0500
commitc439ca69d5c8306a14ee2f3f39e9c833b4cda3e7 (patch)
tree83a4784e0edb4313fe2f5ab3fa3c35fef54858eb
parentdm cache: add support for discard passdown to the origin device (diff)
downloadlinux-dev-c439ca69d5c8306a14ee2f3f39e9c833b4cda3e7.tar.xz
linux-dev-c439ca69d5c8306a14ee2f3f39e9c833b4cda3e7.zip
dm snapshot: don't define direct_access if we don't support it
Don't define a direct_access function that fails, dm_dax_direct_access already fails with -EIO if the pointer is zero; Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
-rw-r--r--drivers/md/dm-snap.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 36805b12661e..a168963b757d 100644
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -2338,13 +2338,6 @@ static int origin_map(struct dm_target *ti, struct bio *bio)
return do_origin(o->dev, bio);
}
-static long origin_dax_direct_access(struct dm_target *ti, pgoff_t pgoff,
- long nr_pages, void **kaddr, pfn_t *pfn)
-{
- DMWARN("device does not support dax.");
- return -EIO;
-}
-
/*
* Set the target "max_io_len" field to the minimum of all the snapshots'
* chunk sizes.
@@ -2404,7 +2397,6 @@ static struct target_type origin_target = {
.postsuspend = origin_postsuspend,
.status = origin_status,
.iterate_devices = origin_iterate_devices,
- .direct_access = origin_dax_direct_access,
};
static struct target_type snapshot_target = {