[PATCH] x86/boot: drop memset from copy.S

[Cao jin]

According to objdump output of setup, function memset is not used in
setup code. Currently, all usage of memset in setup come from macro
definition of string.h.

Signed-off-by: Cao jin <caoj.fnst@xxxxxxxxxxxxxx>
---
Compiled and booted under x86_64; compiled under i386.

Questions: now there is 2 definition of memcpy, one lies in copy.S,
another lies in string.h which is mapped to gcc builtin function. Do we
still need 2 definition? Could we move the content of copy.S to
boot/string.c?

At first glance, the usage of string.{c.h} of setup is kind of confusing,
they are also used in compressed/ and purgatory/

 arch/x86/boot/copy.S | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/arch/x86/boot/copy.S b/arch/x86/boot/copy.S
index 15d9f74b0008..5157d08b0ff2 100644
--- a/arch/x86/boot/copy.S
+++ b/arch/x86/boot/copy.S
@@ -33,21 +33,6 @@ GLOBAL(memcpy)
 	retl
 ENDPROC(memcpy)
 
-GLOBAL(memset)
-	pushw	%di
-	movw	%ax, %di
-	movzbl	%dl, %eax
-	imull	$0x01010101,%eax
-	pushw	%cx
-	shrw	$2, %cx
-	rep; stosl
-	popw	%cx
-	andw	$3, %cx
-	rep; stosb
-	popw	%di
-	retl
-ENDPROC(memset)
-
 GLOBAL(copy_from_fs)
 	pushw	%ds
 	pushw	%fs
-- 
2.17.0