sysctl: use umode_t for table permissions

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 703cfa3..bb9127d 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -1038,7 +1038,7 @@
 	const char *procname;		/* Text ID for /proc/sys, or zero */
 	void *data;
 	int maxlen;
-	mode_t mode;
+	umode_t mode;
 	struct ctl_table *child;
 	struct ctl_table *parent;	/* Automatically set */
 	proc_handler *proc_handler;	/* Callback for text formatting */