include/asm-powerpc/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
  12 struct task_struct;
  13
  14 #ifdef __powerpc64__
  15 #include <asm/paca.h>
  16
  17 static inline struct task_struct *get_current(void)
  18 {
  19         struct task_struct *task;
  20
  21         __asm__ __volatile__("ld %0,%1(13)"
  22         : "=r" (task)
  23         : "i" (offsetof(struct paca_struct, __current)));
  24
  25         return task;
  26 }
  27 #define current get_current()
  28
  29 #else
  30
  31 /*
  32  * We keep `current' in r2 for speed.
  33  */
  34 register struct task_struct *current asm ("r2");
  35
  36 #endif
  37
  38 #endif /* __KERNEL__ */
  39 #endif /* _ASM_POWERPC_CURRENT_H */