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

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