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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

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source code of linux/include/asm-generic/switch_to.h