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

Signed-off-by: David S. Miller <davem@davemloft.net>

include/asm-sparc/current.h

@@ -1,31 +1,34 @@
-/*
+/* 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
+#ifndef _SPARC_CURRENT_H
-#define _ASM_CURRENT_H
+#define _SPARC_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.
- */
 
 #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. */
+#ifdef CONFIG_SPARC32
-/* We also obfuscate get_current() to check if anyone used that by mistake. */
+/* 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) */

include/asm-sparc64/current.h

@@ -1,8 +1 @@
-#ifndef _SPARC64_CURRENT_H
+#include <asm-sparc/current.h>
-#define _SPARC64_CURRENT_H
-
-#include <linux/thread_info.h>
-
-register struct task_struct *current asm("g4");
-
-#endif /* !(_SPARC64_CURRENT_H) */