[linux.git] / include / asm-generic / switch_to.h

/* Generic task switch macro wrapper, based on MN10300 definitions.
 *
 * It should be possible to use these on really simple architectures,
 * but it serves more as a starting point for new ports.
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */
#ifndef __ASM_GENERIC_SWITCH_TO_H
#define __ASM_GENERIC_SWITCH_TO_H

#include <linux/thread_info.h>

/*
 * Context switching is now performed out-of-line in switch_to.S
 */
extern struct task_struct *__switch_to(struct task_struct *,
				       struct task_struct *);

#define switch_to(prev, next, last)					\
	do {								\
		((last) = __switch_to((prev), (next)));			\
	} while (0)

#endif /* __ASM_GENERIC_SWITCH_TO_H */
Commit	Line	Data
158bc507 DH	1	/* Generic task switch macro wrapper, based on MN10300 definitions.
	2	*
	3	* It should be possible to use these on really simple architectures,
	4	* but it serves more as a starting point for new ports.
	5	*
	6	* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
	7	* Written by David Howells ([email protected])
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public Licence
	11	* as published by the Free Software Foundation; either version
	12	* 2 of the Licence, or (at your option) any later version.
	13	*/
	14	#ifndef __ASM_GENERIC_SWITCH_TO_H
	15	#define __ASM_GENERIC_SWITCH_TO_H
	16
	17	#include <linux/thread_info.h>
	18
	19	/*
	20	* Context switching is now performed out-of-line in switch_to.S
	21	*/
	22	extern struct task_struct __switch_to(struct task_struct ,
	23	struct task_struct *);
	24
	25	#define switch_to(prev, next, last) \
	26	do { \
	27	((last) = __switch_to((prev), (next))); \
	28	} while (0)
	29
	30	#endif /* __ASM_GENERIC_SWITCH_TO_H */