arch/unicore32/include/asm/switch_to.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Task switching for PKUnity SoC and UniCore ISA
   4  *
   5  * Copyright (C) 2001-2012 GUAN Xue-tao
   6  */
   7 #ifndef __UNICORE_SWITCH_TO_H__
   8 #define __UNICORE_SWITCH_TO_H__
   9
  10 struct task_struct;
  11 struct thread_info;
  12
  13 /*
  14  * switch_to(prev, next) should switch from task `prev' to `next'
  15  * `prev' will never be the same as `next'.  schedule() itself
  16  * contains the memory barrier to tell GCC not to cache `current'.
  17  */
  18 extern struct task_struct *__switch_to(struct task_struct *,
  19                 struct thread_info *, struct thread_info *);
  20
  21 #define switch_to(prev, next, last)                                     \
  22         do {                                                            \
  23                 last = __switch_to(prev, task_thread_info(prev),        \
  24                                         task_thread_info(next));        \
  25         } while (0)
  26
  27 #endif /* __UNICORE_SWITCH_TO_H__ */