arch/frv/kernel/sys_frv.c

   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
  30 asmlinkage 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 }