--- linux/fs/minix/chrdev.c	2018/04/24 18:12:27	1.1.1.4
+++ linux/fs/minix/chrdev.c	2018/04/24 18:14:25	1.1.1.5
@@ -56,7 +56,7 @@ struct inode_operations minix_chrdev_ino
 	NULL,			/* rename */
 	NULL,			/* readlink */
 	NULL,			/* follow_link */
-	minix_bmap,		/* bmap */
-	minix_truncate		/* truncate */
+	NULL,			/* bmap */
+	NULL			/* truncate */
 };