const: mark remaining inode_operations as 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/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 680e86c..b18c499 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -432,7 +432,7 @@
 	.sync_page		= block_sync_page,
 };
 
-static struct inode_operations def_mdt_iops;
+static const struct inode_operations def_mdt_iops;
 static struct file_operations def_mdt_fops;
 
 /*