[SPARC]: Merge asm-sparc{,64}/current.h

/*

 *  include/asm-sparc/current.h

/* include/asm-sparc/current.h

 *

 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation

 * Copyright (C) 2002 Pete Zaitcev (zaitcev@yahoo.com)

 * Copyright (C) 2007 David S. Miller (davem@davemloft.net)

 *

 *  Derived from "include/asm-s390/current.h" by

 *  Martin Schwidefsky (schwidefsky@de.ibm.com)

 *  Derived from "include/asm-i386/current.h"

*/

#ifndef _ASM_CURRENT_H

#define _ASM_CURRENT_H

/*

 * At the sparc64 DaveM keeps current_thread_info in %g4.

 * We might want to consider doing the same to shave a few cycles.

 */

#ifndef _SPARC_CURRENT_H

#define _SPARC_CURRENT_H

#include <linux/thread_info.h>

struct task_struct;

#ifdef CONFIG_SPARC64

register struct task_struct *current asm("g4");

#endif

/* Two stage process (inline + #define) for type-checking. */

/* We also obfuscate get_current() to check if anyone used that by mistake. */

#ifdef CONFIG_SPARC32

/* We might want to consider using %g4 like sparc64 to shave a few cycles.

 *

 * Two stage process (inline + #define) for type-checking.

 * We also obfuscate get_current() to check if anyone used that by mistake.

 */

struct task_struct;

static inline struct task_struct *__get_current(void)

{

	return current_thread_info()->task;

}

#define current __get_current()

#endif

#endif /* !(_ASM_CURRENT_H) */

#endif /* !(_SPARC_CURRENT_H) */

#ifndef _SPARC64_CURRENT_H

#define _SPARC64_CURRENT_H

#include <linux/thread_info.h>

register struct task_struct *current asm("g4");

#endif /* !(_SPARC64_CURRENT_H) */

#include <asm-sparc/current.h>