current.h
#ifndef _ASM_POWERPC_CURRENT_H
#define _ASM_POWERPC_CURRENT_H
#ifdef __KERNEL__
/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
struct task_struct;
#ifdef __powerpc64__
#include <asm/paca.h>
#define current (get_paca()->__current)
#else
/*
* We keep `current' in r2 for speed.
*/
register struct task_struct *current asm ("r2");
#endif
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_CURRENT_H */