[src/trunk]: src/sys/arch/x86/x86 Wait until all cpus are online, before usin...

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

details:   https://anonhg.NetBSD.org/src/rev/9a0ceecc8407
branches:  trunk
changeset: 333918:9a0ceecc8407
user:      cherry <cherry%NetBSD.org@localhost>
date:      Sat Nov 22 06:45:08 2014 +0000

description:
Wait until all cpus are online, before using the codepath
which syncs all per-cpu cached copies of L4 tables.
(On both x86_64 and i386/pae)

This avoids an early bootup mutex use before mutex init situation.

Reported by manu@

diffstat:

 sys/arch/x86/x86/pmap.c |  7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diffs (28 lines):

diff -r 9520d9143dd9 -r 9a0ceecc8407 sys/arch/x86/x86/pmap.c
--- a/sys/arch/x86/x86/pmap.c   Sat Nov 22 01:28:13 2014 +0000
+++ b/sys/arch/x86/x86/pmap.c   Sat Nov 22 06:45:08 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.184 2014/10/14 06:59:58 bouyer Exp $        */
+/*     $NetBSD: pmap.c,v 1.185 2014/11/22 06:45:08 cherry Exp $        */
 
 /*-
  * Copyright (c) 2008, 2010 The NetBSD Foundation, Inc.
@@ -171,7 +171,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.184 2014/10/14 06:59:58 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.185 2014/11/22 06:45:08 cherry Exp $");
 
 #include "opt_user_ldt.h"
 #include "opt_lockdebug.h"
@@ -4187,8 +4187,7 @@
                        pmap_pte_set(&pdep[i], pte);
 #if defined(PAE) || defined(__x86_64__)
                        if (level == PTP_LEVELS && i >= PDIR_SLOT_KERN) {
-                               if (__predict_true(
-                                   cpu_info_primary.ci_flags & CPUF_PRESENT)) {
+                         if (__predict_true(mp_online == true)) {
                                        /* update per-cpu PMDs on all cpus */
                                        xen_kpm_sync(pmap_kernel(), i);
                                } else {