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__ */ 28