dm linear: add WRITE SAME support

The linear target can already support WRITE SAME requests so signal
this by setting num_write_same_requests to 1.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index 1bf19a93eef05f00c68f3ad096dd46273991ef93..82222a8cf7505e45d31511b07cd12855ddfb4004 100644 (file)
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -55,6 +55,7 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 
        ti->num_flush_requests = 1;
        ti->num_discard_requests = 1;
+       ti->num_write_same_requests = 1;
        ti->private = lc;
        return 0;
 
@@ -155,7 +156,7 @@ static int linear_iterate_devices(struct dm_target *ti,
 
 static struct target_type linear_target = {
        .name   = "linear",
-       .version = {1, 1, 0},
+       .version = {1, 2, 0},
        .module = THIS_MODULE,
        .ctr    = linear_ctr,
        .dtr    = linear_dtr,