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x86: avoid early crash in disable_local_APIC()
author
Jan Beulich
<jbeulich@novell.com>
Wed, 14 Jan 2009 12:28:51 +0000
(12:28 +0000)
committer
Ingo Molnar
<mingo@elte.hu>
Thu, 15 Jan 2009 11:04:40 +0000
(12:04 +0100)
E.g. when called due to an early panic.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/apic.c
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diff --git
a/arch/x86/kernel/apic.c
b/arch/x86/kernel/apic.c
index
c3dd64f
..
38d6aab
100644
(file)
--- a/
arch/x86/kernel/apic.c
+++ b/
arch/x86/kernel/apic.c
@@
-895,6
+895,10
@@
void disable_local_APIC(void)
{
unsigned int value;
+ /* APIC hasn't been mapped yet */
+ if (!apic_phys)
+ return;
+
clear_local_APIC();
/*