-#include <linux/linkage.h>
-#include <asm/dwarf2.h>
-
/*
* Zero a page.
* rdi page
*/
- ALIGN
-clear_page_c:
- CFI_STARTPROC
- movl $4096/8,%ecx
- xorl %eax,%eax
- rep stosq
- ret
- CFI_ENDPROC
-ENDPROC(clear_page)
-
-ENTRY(clear_page)
- CFI_STARTPROC
+ .globl clear_page
+ .p2align 4
+clear_page:
xorl %eax,%eax
movl $4096/64,%ecx
.p2align 4
jnz .Lloop
nop
ret
- CFI_ENDPROC
-.Lclear_page_end:
-ENDPROC(clear_page)
+clear_page_end:
/* Some CPUs run faster using the string instructions.
It is also a lot simpler. Use this when possible */
#include <asm/cpufeature.h>
- .section .altinstr_replacement,"ax"
-1: .byte 0xeb /* jmp <disp8> */
- .byte (clear_page_c - clear_page) - (2f - 1b) /* offset */
-2:
- .previous
.section .altinstructions,"a"
.align 8
- .quad clear_page
- .quad 1b
- .byte X86_FEATURE_REP_GOOD
- .byte .Lclear_page_end - clear_page
- .byte 2b - 1b
+ .quad clear_page
+ .quad clear_page_c
+ .byte X86_FEATURE_REP_GOOD
+ .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
+clear_page_c_end:
.previous