arch/powerpc/include/asm/current.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef _ASM_POWERPC_CURRENT_H
   3 #define _ASM_POWERPC_CURRENT_H
   4 #ifdef __KERNEL__
   5
   6 /*
   7  */
   8
   9 struct task_struct;
  10
  11 #ifdef __powerpc64__
  12 #include <linux/stddef.h>
  13 #include <asm/paca.h>
  14
  15 static inline struct task_struct *get_current(void)
  16 {
  17         struct task_struct *task;
  18
  19         __asm__ __volatile__("ld %0,%1(13)"
  20         : "=r" (task)
  21         : "i" (offsetof(struct paca_struct, __current)));
  22
  23         return task;
  24 }
  25 #define current get_current()
  26
  27 #else
  28
  29 /*
  30  * We keep `current' in r2 for speed.
  31  */
  32 register struct task_struct *current asm ("r2");
  33
  34 #endif
  35
  36 #endif /* __KERNEL__ */
  37 #endif /* _ASM_POWERPC_CURRENT_H */