LXR linux/arch/frv/kernel/sys

   1/* sys_frv.c: FRV arch-specific syscall wrappers
   2 *
   3 * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 * - Derived from arch/m68k/kernel/sys_m68k.c
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License
   9 * as published by the Free Software Foundation; either version
  10 * 2 of the License, or (at your option) any later version.
  11 */
  12
  13#include <linux/errno.h>
  14#include <linux/sched.h>
  15#include <linux/mm.h>
  16#include <linux/fs.h>
  17#include <linux/smp.h>
  18#include <linux/sem.h>
  19#include <linux/msg.h>
  20#include <linux/shm.h>
  21#include <linux/stat.h>
  22#include <linux/mman.h>
  23#include <linux/file.h>
  24#include <linux/syscalls.h>
  25#include <linux/ipc.h>
  26
  27#include <asm/setup.h>
  28#include <asm/uaccess.h>
  29
  30asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
  31                          unsigned long prot, unsigned long flags,
  32                          unsigned long fd, unsigned long pgoff)
  33{
  34        /* As with sparc32, make sure the shift for mmap2 is constant
  35           (12), no matter what PAGE_SIZE we have.... */
  36
  37        /* But unlike sparc32, don't just silently break if we're
  38           trying to map something we can't */
  39        if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
  40                return -EINVAL;
  41
  42        return sys_mmap_pgoff(addr, len, prot, flags, fd,
  43                              pgoff >> (PAGE_SHIFT - 12));
  44}
  45