[src/trunk]: src/sys/kern Drop to spl0 after the pmap_activate call. Should ...

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

details:   https://anonhg.NetBSD.org/src/rev/13b4a076a9b1
branches:  trunk
changeset: 811713:13b4a076a9b1
user:      skrll <skrll%NetBSD.org@localhost>
date:      Thu Nov 12 10:47:30 2015 +0000

description:
Drop to spl0 after the pmap_activate call.  Should address

PR port-arm/50420: curcpu()->ci_pmap_cur != pm || pm->pm_pai[0].pai_asid == curcpu()->ci_pmap_asid_cur" failed

Discussed with matt@ and rmind@

diffstat:

 sys/kern/kern_lwp.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (29 lines):

diff -r 178fb9840520 -r 13b4a076a9b1 sys/kern/kern_lwp.c
--- a/sys/kern/kern_lwp.c       Thu Nov 12 10:31:29 2015 +0000
+++ b/sys/kern/kern_lwp.c       Thu Nov 12 10:47:30 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_lwp.c,v 1.180 2015/10/02 16:54:15 christos Exp $  */
+/*     $NetBSD: kern_lwp.c,v 1.181 2015/11/12 10:47:30 skrll Exp $     */
 
 /*-
  * Copyright (c) 2001, 2006, 2007, 2008, 2009 The NetBSD Foundation, Inc.
@@ -211,7 +211,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.180 2015/10/02 16:54:15 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.181 2015/11/12 10:47:30 skrll Exp $");
 
 #include "opt_ddb.h"
 #include "opt_lockdebug.h"
@@ -992,9 +992,9 @@
                prev->l_ctxswtch = 0;
        }
        KPREEMPT_DISABLE(new_lwp);
-       spl0();
        if (__predict_true(new_lwp->l_proc->p_vmspace))
                pmap_activate(new_lwp);
+       spl0();
 
        /* Note trip through cpu_switchto(). */
        pserialize_switchpoint();