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  */
18 extern 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