switch_to.h

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#ifndef __ASM_ARM_SWITCH_TO_H
#define __ASM_ARM_SWITCH_TO_H

#include <linux/thread_info.h>

/*
 * switch_to(prev, next) should switch from task `prev' to `next'
 * `prev' will never be the same as `next'.  schedule() itself
 * contains the memory barrier to tell GCC not to cache `current'.
 */
extern struct task_struct *__switch_to(struct task_struct *, struct thread_info *, struct thread_info *);

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

#endif /* __ASM_ARM_SWITCH_TO_H */