[src/trunk]: src/sys/arch/amd64/amd64 Free tables are already zeroed in xen_p...

[jym <jym%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4d0859a9aba0
branches:  trunk
changeset: 759868:4d0859a9aba0
user:      jym <jym%NetBSD.org@localhost>
date:      Sat Dec 18 13:53:34 2010 +0000

description:
Free tables are already zeroed in xen_pmap_bootstrap. No need to
do it a second time in assembly code.

diffstat:

 sys/arch/amd64/amd64/locore.S |  9 ++-------
 1 files changed, 2 insertions(+), 7 deletions(-)

diffs (30 lines):

diff -r 02312ea1c139 -r 4d0859a9aba0 sys/arch/amd64/amd64/locore.S
--- a/sys/arch/amd64/amd64/locore.S     Sat Dec 18 13:06:51 2010 +0000
+++ b/sys/arch/amd64/amd64/locore.S     Sat Dec 18 13:53:34 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: locore.S,v 1.62 2010/10/21 11:43:22 yamt Exp $ */
+/*     $NetBSD: locore.S,v 1.63 2010/12/18 13:53:34 jym Exp $  */
 
 /*
  * Copyright-o-rama!
@@ -786,12 +786,6 @@
        movq    %rax, %rsi
        movq    %rsi,(_C_LABEL(lwp0)+L_PCB)     /* XXX L_PCB != uarea */
        
-       xorq    %rax,%rax
-       movq    %rsi,%rdi
-       movq    $USPACE,%rcx
-       rep
-       stosb
-
        /*
         * Set new stack and clear segments
         */
@@ -799,6 +793,7 @@
        leaq    (USPACE-FRAMESIZE)(%rsi),%rsp
        xorq    %rbp,%rbp
 
+       xorw    %ax,%ax
        movw    %ax,%gs
        movw    %ax,%fs