From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Wed, 25 Feb 2009 17:42:25 +0000 (-0800)
Subject: xen: disable interrupts early, as start_kernel expects
X-Git-Tag: v2.6.28.8~43
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0109d01cfb91aa96c2d96da089945188d8c2d3d7;p=thirdparty%2Fkernel%2Fstable.git

xen: disable interrupts early, as start_kernel expects

commit 55d8085671863fe4ee6a17b7814bd38180a44e1d upstream.

This avoids a lockdep warning from:
	if (DEBUG_LOCKS_WARN_ON(unlikely(!early_boot_irqs_enabled)))
		return;
in trace_hardirqs_on_caller();

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Cc: Xen-devel <xen-devel@lists.xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 5e4686d70f629..59439c4bae0a1 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1669,6 +1669,9 @@ asmlinkage void __init xen_start_kernel(void)
 	   possible map and a non-dummy shared_info. */
 	per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
 
+	local_irq_disable();
+	early_boot_irqs_off();
+
 	xen_raw_console_write("mapping kernel into physical memory\n");
 	pgd = xen_setup_kernel_pagetable(pgd, xen_start_info->nr_pages);