const: make block_device_operations const

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index 13c1aee..a808b15 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -125,7 +125,7 @@
 static DEFINE_MUTEX(ctl_mutex);	/* Serialize open/close/setup/teardown */
 static LIST_HEAD(osdblkdev_list);
 
-static struct block_device_operations osdblk_bd_ops = {
+static const struct block_device_operations osdblk_bd_ops = {
 	.owner		= THIS_MODULE,
 };