[src/trunk]: src/sys/arch/x86/x86 return after calling xen_pagezero(), don't ...

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

details:   https://anonhg.NetBSD.org/src/rev/3bd593ef9635
branches:  trunk
changeset: 365989:3bd593ef9635
user:      bouyer <bouyer%NetBSD.org@localhost>
date:      Sat May 07 14:59:25 2022 +0000

description:
return after calling xen_pagezero(), don't fall back to the legacy
pmap_zero_page() method.
This should only affect performances.

diffstat:

 sys/arch/x86/x86/pmap.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (30 lines):

diff -r eebd175354d5 -r 3bd593ef9635 sys/arch/x86/x86/pmap.c
--- a/sys/arch/x86/x86/pmap.c   Sat May 07 14:25:12 2022 +0000
+++ b/sys/arch/x86/x86/pmap.c   Sat May 07 14:59:25 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.413 2022/01/02 20:28:53 andvar Exp $        */
+/*     $NetBSD: pmap.c,v 1.414 2022/05/07 14:59:25 bouyer Exp $        */
 
 /*
  * Copyright (c) 2008, 2010, 2016, 2017, 2019, 2020 The NetBSD Foundation, Inc.
@@ -130,7 +130,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.413 2022/01/02 20:28:53 andvar Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.414 2022/05/07 14:59:25 bouyer Exp $");
 
 #include "opt_user_ldt.h"
 #include "opt_lockdebug.h"
@@ -3813,8 +3813,10 @@
        memset(PAGE_ALIGNED(PMAP_DIRECT_MAP(pa)), 0, PAGE_SIZE);
 #else
 #if defined(XENPV)
-       if (XEN_VERSION_SUPPORTED(3, 4))
+       if (XEN_VERSION_SUPPORTED(3, 4)) {
                xen_pagezero(pa);
+               return;
+       }
 #endif
        struct cpu_info *ci;
        pt_entry_t *zpte;