xen/blkback: remove unused pers_gnts_lock from struct xen_blkif_ring

jgross1 · konradwilk · commit 6f2f39ad1a54 · 2018-08-27T12:12:04.000-04:00
pers_gnts_lock isn't being used anywhere. Remove it.

Signed-off-by: Juergen Gross &lt;jgross@suse.com&gt;
Reviewed-by: Roger Pau Monné &lt;roger.pau@citrix.com&gt;
Signed-off-by: Konrad Rzeszutek Wilk &lt;konrad.wilk@oracle.com&gt;
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
@@ -269,7 +269,6 @@ struct xen_blkif_ring {
 	wait_queue_head_t	pending_free_wq;
 
 	/* Tree to store persistent grants. */
-	spinlock_t		pers_gnts_lock;
 	struct rb_root		persistent_gnts;
 	unsigned int		persistent_gnt_c;
 	atomic_t		persistent_gnt_in_use;
