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
  18 register 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  */
  27 struct task_struct;
  28 static 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) */