36 строки
1.1 KiB
C
36 строки
1.1 KiB
C
/* FR-V CPU basic task switching
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*
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* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_SWITCH_TO_H
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#define _ASM_SWITCH_TO_H
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#include <linux/thread_info.h>
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/*
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* switch_to(prev, next) should switch from task `prev' to `next'
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* `prev' will never be the same as `next'.
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* The `mb' is to tell GCC not to cache `current' across this call.
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*/
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extern asmlinkage
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struct task_struct *__switch_to(struct thread_struct *prev_thread,
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struct thread_struct *next_thread,
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struct task_struct *prev);
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#define switch_to(prev, next, last) \
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do { \
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(prev)->thread.sched_lr = \
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(unsigned long) __builtin_return_address(0); \
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(last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \
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mb(); \
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} while(0)
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#endif /* _ASM_SWITCH_TO_H */
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