dm snapshot: don't define direct_access if we don't support it (c439ca69) · Commits · 戴 / test

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:

drivers/md/dm-snap.c

+0 −8

Original line number	Diff line number	Diff line
		@@ -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 = {