From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Sat, 21 Feb 2009 07:01:26 +0000 (-0800)
Subject: xen: disable preempt for leave_lazy_mmu
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5caecb9432428241d0c641897f07ff4003f1b55f;p=linux-beck.git

xen: disable preempt for leave_lazy_mmu

xen_mc_flush() requires preemption to be disabled for its own sanity,
so disable it while we're flushing.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---

diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 3f2d0fe5e6a8..0e572380413b 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1812,8 +1812,10 @@ __init void xen_post_allocator_init(void)
 
 static void xen_leave_lazy_mmu(void)
 {
+	preempt_disable();
 	xen_mc_flush();
 	paravirt_leave_lazy_mmu();
+	preempt_enable();
 }
 
 const struct pv_mmu_ops xen_mmu_ops __initdata = {