linux-kernel - [PATCH RFC V9 4/19] xen: Defer spinlock setup until boot CPU setup

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Message-Id: <20130601192243.5966.80786.sendpatchset@codeblue>
Date:	Sun, 02 Jun 2013 00:52:43 +0530
From:	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
To:	<gleb@...hat.com>, <mingo@...hat.com>, <jeremy@...p.org>,
	<x86@...nel.org>, <konrad.wilk@...cle.com>, <hpa@...or.com>,
	<pbonzini@...hat.com>
Cc:	linux-doc@...r.kernel.org, <habanero@...ux.vnet.ibm.com>,
	Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>,
	<xen-devel@...ts.xensource.com>, <peterz@...radead.org>,
	<mtosatti@...hat.com>, <stefano.stabellini@...citrix.com>,
	<andi@...stfloor.org>, <attilio.rao@...rix.com>,
	<ouyang@...pitt.edu>, <gregkh@...e.de>, <agraf@...e.de>,
	<chegu_vinod@...com>, <torvalds@...ux-foundation.org>,
	<avi.kivity@...il.com>, <tglx@...utronix.de>,
	<kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<stephan.diestelhorst@....com>, <riel@...hat.com>,
	<drjones@...hat.com>, <virtualization@...ts.linux-foundation.org>,
	<srivatsa.vaddagiri@...il.com>
Subject: [PATCH RFC V9 4/19]  xen: Defer spinlock setup until boot CPU setup

xen: Defer spinlock setup until boot CPU setup

From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

There's no need to do it at very early init, and doing it there
makes it impossible to use the jump_label machinery.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@...ux.vnet.ibm.com>
---
 arch/x86/xen/smp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 8ff3799..dcdc91c 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -246,6 +246,7 @@ static void __init xen_smp_prepare_boot_cpu(void)
 
 	xen_filter_cpu_maps();
 	xen_setup_vcpu_info_placement();
+	xen_init_spinlocks();
 }
 
 static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
@@ -647,7 +648,6 @@ void __init xen_smp_init(void)
 {
 	smp_ops = xen_smp_ops;
 	xen_fill_possible_map();
-	xen_init_spinlocks();
 }
 
 static void __init xen_hvm_smp_prepare_cpus(unsigned int max_cpus)

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