/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) */