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/paride/pcd.c b/drivers/block/paride/pcd.c
index 9f3518c..8866ca3 100644
--- a/drivers/block/paride/pcd.c
+++ b/drivers/block/paride/pcd.c
@@ -247,7 +247,7 @@
 	return cdrom_media_changed(&cd->info);
 }
 
-static struct block_device_operations pcd_bdops = {
+static const struct block_device_operations pcd_bdops = {
 	.owner		= THIS_MODULE,
 	.open		= pcd_block_open,
 	.release	= pcd_block_release,