[PATCH] x86_64: Remove optimization for B stepping AMD K8

[linux-2.6.git] / arch / x86_64 / lib / clear_page.S

diff --git a/arch/x86_64/lib/clear_page.S b/arch/x86_64/lib/clear_page.S
index 30a9da458c152b8f1c426258ecf26fe4ea02e977..43d9fa136180f7376d6e45e0803fdd290c3a3ac7 100644 (file)
--- a/arch/x86_64/lib/clear_page.S
+++ b/arch/x86_64/lib/clear_page.S
@@ -5,46 +5,8 @@
        .globl clear_page
        .p2align 4
 clear_page:
        .globl clear_page
        .p2align 4
 clear_page:

-       xorl   %eax,%eax
-       movl   $4096/64,%ecx
-       .p2align 4
-.Lloop:
-       decl    %ecx
-#define PUT(x) movq %rax,x*8(%rdi) 
-       movq %rax,(%rdi)
-       PUT(1)
-       PUT(2)
-       PUT(3)
-       PUT(4)
-       PUT(5)
-       PUT(6)
-       PUT(7)
-       leaq    64(%rdi),%rdi
-       jnz     .Lloop
-       nop
-       ret
-clear_page_end:        
-       
-       /* C stepping K8 run faster using the string instructions.
-          It is also a lot simpler. Use this when possible */
-       
-#include <asm/cpufeature.h>
-               
-       .section .altinstructions,"a"
-       .align 8
-       .quad  clear_page
-       .quad  clear_page_c
-       .byte  X86_FEATURE_K8_C
-       .byte  clear_page_end-clear_page        
-       .byte  clear_page_c_end-clear_page_c
-       .previous
-
-       .section .altinstr_replacement,"ax"
-clear_page_c:

        movl $4096/8,%ecx
        xorl %eax,%eax
        rep 
        stosq
        ret
        movl $4096/8,%ecx
        xorl %eax,%eax
        rep 
        stosq
        ret

-clear_page_c_end:
-       .previous