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[Xen-devel] [PATCH RFC V4 04/11] xen: defer spinlock setup until boot CP

To: "H. Peter Anvin" <hpa@xxxxxxxxx>
Subject: [Xen-devel] [PATCH RFC V4 04/11] xen: defer spinlock setup until boot CPU setup
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Tue, 4 Oct 2011 16:31:10 -0700
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>, Nick Piggin <npiggin@xxxxxxxxx>, KVM <kvm@xxxxxxxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Andi Kleen <andi@xxxxxxxxxxxxxx>, Avi Kivity <avi@xxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

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@xxxxxxxxxx>
---
 arch/x86/xen/smp.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index e79dbb9..4dec905 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -200,6 +200,7 @@ 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)
@@ -513,7 +514,6 @@ 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)
-- 
1.7.6.4


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