Bury __put_super_and_need_restart()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/drop_caches.c

@@ -8,6 +8,7 @@
 #include <linux/writeback.h>
 #include <linux/sysctl.h>
 #include <linux/gfp.h>
+#include "internal.h"
 
 /* A global variable is a bit ugly, but it keeps the code simple */
 int sysctl_drop_caches;