LXR linux/arch/mn10300/include/asm/current.h

   1/* MN10300 Current task structure accessor
   2 *
   3 * Copyright (C) 2007 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#ifndef _ASM_CURRENT_H
  12#define _ASM_CURRENT_H
  13
  14#include <linux/thread_info.h>
  15
  16/*
  17 * dedicate E2 to keeping the current task pointer
  18 */
  19#ifdef CONFIG_MN10300_CURRENT_IN_E2
  20
  21register struct task_struct *const current asm("e2") __attribute__((used));
  22
  23#define get_current() current
  24
  25extern struct task_struct *__current;
  26
  27#else
  28static inline __attribute__((const))
  29struct task_struct *get_current(void)
  30{
  31        return current_thread_info()->task;
  32}
  33
  34#define current get_current()
  35#endif
  36
  37#endif /* _ASM_CURRENT_H */
  38