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/floppy.c b/drivers/block/floppy.c
index 2b387c2..5c01f74 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3907,7 +3907,7 @@
 	return res;
 }
 
-static struct block_device_operations floppy_fops = {
+static const struct block_device_operations floppy_fops = {
 	.owner			= THIS_MODULE,
 	.open			= floppy_open,
 	.release		= floppy_release,