linux-kernel - [PATCH 10/15] x86, apic: Set fixmap only one time

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Date:	Sat, 23 Oct 2010 18:02:24 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 10/15] x86, apic: Set fixmap only one time

Check if mp_lapic_addr is assigned or not.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/kernel/apic/apic.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 3a4e770..2cfa622 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1682,6 +1682,9 @@ void __init init_apic_mappings(void)
 
 void __init smp_register_lapic_address(unsigned long address)
 {
+	if (mp_lapic_addr)
+		return;
+
 	mp_lapic_addr = address;
 
 	set_fixmap_nocache(FIX_APIC_BASE, address);
-- 
1.7.1

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