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         /* get_current can be cached by the compiler, so no volatile */
  20         asm ("ld %0,%1(13)"
  21         : "=r" (task)
  22         : "i" (offsetof(struct paca_struct, __current)));
  23
  24         return task;
  25 }
  26 #define current get_current()
  27
  28 #else
  29
  30 /*
  31  * We keep `current' in r2 for speed.
  32  */
  33 register struct task_struct *current asm ("r2");
  34
  35 #endif
  36
  37 #endif /* __KERNEL__ */
  38 #endif /* _ASM_POWERPC_CURRENT_H */