On 82489DX we don't have ESR register so we should not
write it.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
---

Index: linux-2.6.git/arch/x86/kernel/apic.c
===================================================================
--- linux-2.6.git.orig/arch/x86/kernel/apic.c	2008-09-14 11:46:13.000000000 +0400
+++ linux-2.6.git/arch/x86/kernel/apic.c	2008-09-14 11:48:37.000000000 +0400
@@ -1131,7 +1131,7 @@ void __cpuinit setup_local_APIC(void)
 
 #ifdef CONFIG_X86_32
 	/* Pound the ESR really hard over the head with a big hammer - mbligh */
-	if (esr_disable) {
+	if (lapic_is_integrated() && esr_disable) {
 		apic_write(APIC_ESR, 0);
 		apic_write(APIC_ESR, 0);
 		apic_write(APIC_ESR, 0);

-- 
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