LXR linux/arch/powerpc/include/asm/current.h

   1#ifndef _ASM_POWERPC_CURRENT_H
   2#define _ASM_POWERPC_CURRENT_H
   3#ifdef __KERNEL__
   4
   5/*
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11
  12struct task_struct;
  13
  14#ifdef __powerpc64__
  15#include <linux/stddef.h>
  16#include <asm/paca.h>
  17
  18static inline struct task_struct *get_current(void)
  19{
  20        struct task_struct *task;
  21
  22        __asm__ __volatile__("ld %0,%1(13)"
  23        : "=r" (task)
  24        : "i" (offsetof(struct paca_struct, __current)));
  25
  26        return task;
  27}
  28#define current get_current()
  29
  30#else
  31
  32/*
  33 * We keep `current' in r2 for speed.
  34 */
  35register struct task_struct *current asm ("r2");
  36
  37#endif
  38
  39#endif /* __KERNEL__ */
  40#endif /* _ASM_POWERPC_CURRENT_H */
  41