x86: avoid early crash in disable_local_APIC()

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>
git-mirror · Jan 15, 2009 · 4a13ad0 · 4a13ad0
1 parent 5cca0cf
commit 4a13ad0
Showing 1 changed file with 4 additions and 0 deletions.
diff --git 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();
 
 	/*