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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/* include/asm/current.h
   3 *
   4 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
   5 * Copyright (C) 2002 Pete Zaitcev (zaitcev@yahoo.com)
   6 * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
   7 *
   8 *  Derived from "include/asm-s390/current.h" by
   9 *  Martin Schwidefsky (schwidefsky@de.ibm.com)
  10 *  Derived from "include/asm-i386/current.h"
  11*/
  12#ifndef _SPARC_CURRENT_H
  13#define _SPARC_CURRENT_H
  14
  15#include <linux/thread_info.h>
  16
  17#ifdef CONFIG_SPARC64
  18register struct task_struct *current asm("g4");
  19#endif
  20
  21#ifdef CONFIG_SPARC32
  22/* We might want to consider using %g4 like sparc64 to shave a few cycles.
  23 *
  24 * Two stage process (inline + #define) for type-checking.
  25 * We also obfuscate get_current() to check if anyone used that by mistake.
  26 */
  27struct task_struct;
  28static inline struct task_struct *__get_current(void)
  29{
  30        return current_thread_info()->task;
  31}
  32#define current __get_current()
  33#endif
  34
  35#endif /* !(_SPARC_CURRENT_H) */
  36