release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mn10300/mm/cache-disabled.c

   1 /* Handle the cache being disabled
   2  *
   3  * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11 #include <linux/mm.h>
  12
  13 /*
  14  * allow userspace to flush the instruction cache
  15  */
  16 asmlinkage long sys_cacheflush(unsigned long start, unsigned long end)
  17 {
  18         if (end < start)
  19                 return -EINVAL;
  20         return 0;
  21 }