x86: merge getuser asm functions.

getuser_32.S and getuser_64.S are merged into getuser.S.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/lib/Makefile

@@ -5,7 +5,7 @@
 obj-$(CONFIG_SMP) := msr-on-cpu.o
 
 lib-y := delay.o
-lib-y += usercopy_$(BITS).o getuser_$(BITS).o putuser_$(BITS).o
+lib-y += usercopy_$(BITS).o getuser.o putuser_$(BITS).o
 lib-y += memcpy_$(BITS).o
 
 ifeq ($(CONFIG_X86_32),y)

arch/x86/lib/getuser_64.S → arch/x86/lib/getuser.S

@@ -3,6 +3,7 @@
  *
  * (C) Copyright 1998 Linus Torvalds
  * (C) Copyright 2005 Andi Kleen
+ * (C) Copyright 2008 Glauber Costa
  *
  * These functions have a non-standard call interface
  * to make them more efficient, especially as they
@@ -13,13 +14,13 @@
 /*
  * __get_user_X
  *
- * Inputs:	%rax contains the address.
+ * Inputs:	%[r|e]ax contains the address.
  *		The register is modified, but all changes are undone
  *		before returning because the C code doesn't know about it.
  *
- * Outputs:	%rax is error code (0 or -EFAULT)
- *		%rdx contains zero-extended value
- * 
+ * Outputs:	%[r|e]ax is error code (0 or -EFAULT)
+ *		%[r|e]dx contains zero-extended value
+ *
  *
  * These functions should not modify any other registers,
  * as they get called from within inline assembly.
@@ -71,6 +72,7 @@ ENTRY(__get_user_4)
 	CFI_ENDPROC
 ENDPROC(__get_user_4)
 
+#ifdef CONFIG_X86_64
 ENTRY(__get_user_8)
 	CFI_STARTPROC
 	add $7,%_ASM_AX
@@ -83,6 +85,7 @@ ENTRY(__get_user_8)
 	ret
 	CFI_ENDPROC
 ENDPROC(__get_user_8)
+#endif
 
 bad_get_user:
 	CFI_STARTPROC
@@ -96,5 +99,6 @@ END(bad_get_user)
 	_ASM_PTR 1b,bad_get_user
 	_ASM_PTR 2b,bad_get_user
 	_ASM_PTR 3b,bad_get_user
+#ifdef CONFIG_X86_64
 	_ASM_PTR 4b,bad_get_user
-.previous
+#endif

include/asm-x86/asm.h

@@ -3,8 +3,10 @@
 
 #ifdef __ASSEMBLY__
 # define __ASM_FORM(x)	x
+# define __ASM_EX_SEC	.section __ex_table
 #else
 # define __ASM_FORM(x)	" " #x " "
+# define __ASM_EX_SEC	" .section __ex_table,\"a\"\n"
 #endif
 
 #ifdef CONFIG_X86_32
@@ -30,7 +32,7 @@
 
 /* Exception table entry */
 # define _ASM_EXTABLE(from,to) \
-	" .section __ex_table,\"a\"\n" \
+	__ASM_EX_SEC	\
 	_ASM_ALIGN "\n" \
 	_ASM_PTR #from "," #to "\n" \
 	" .previous\n"