#include <linux/linkage.h>
-#include <asm/dwarf2.h>
#include <asm/cpufeature.h>
#include <asm/alternative-asm.h>
* %rdi - page
*/
ENTRY(clear_page)
- CFI_STARTPROC
ALTERNATIVE_2 "jmp clear_page_orig", "", X86_FEATURE_REP_GOOD, \
"jmp clear_page_c_e", X86_FEATURE_ERMS
xorl %eax,%eax
rep stosq
ret
- CFI_ENDPROC
ENDPROC(clear_page)
ENTRY(clear_page_orig)
- CFI_STARTPROC
xorl %eax,%eax
movl $4096/64,%ecx
jnz .Lloop
nop
ret
- CFI_ENDPROC
ENDPROC(clear_page_orig)
ENTRY(clear_page_c_e)
- CFI_STARTPROC
movl $4096,%ecx
xorl %eax,%eax
rep stosb
ret
- CFI_ENDPROC
ENDPROC(clear_page_c_e)