LXR linux/include/asm-generic/switch

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/* Generic task switch macro wrapper.
   3 *
   4 * It should be possible to use these on really simple architectures,
   5 * but it serves more as a starting point for new ports.
   6 *
   7 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   8 * Written by David Howells (dhowells@redhat.com)
   9 */
  10#ifndef __ASM_GENERIC_SWITCH_TO_H
  11#define __ASM_GENERIC_SWITCH_TO_H
  12
  13#include <linux/thread_info.h>
  14
  15/*
  16 * Context switching is now performed out-of-line in switch_to.S
  17 */
  18extern struct task_struct *__switch_to(struct task_struct *,
  19                                       struct task_struct *);
  20
  21#define switch_to(prev, next, last)                                     \
  22        do {                                                            \
  23                ((last) = __switch_to((prev), (next)));                 \
  24        } while (0)
  25
  26#endif /* __ASM_GENERIC_SWITCH_TO_H */
  27