linux-kernel - [PATCH] x86: make APIC_init_uniprocessor() more like smp_prepare

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Date:	Mon, 16 Feb 2009 00:00:50 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86: make APIC_init_uniprocessor() more like smp_prepare_cpus()


Impact: cleanup

1. move localise_nmi_watchdgoe() later
2. change setup_boot_APIC_clock to setup_boot_clock for 64bit

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/kernel/apic.c |   20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

Index: linux-2.6/arch/x86/kernel/apic.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic.c
+++ linux-2.6/arch/x86/kernel/apic.c
@@ -1656,32 +1656,28 @@ int __init APIC_init_uniprocessor(void)
 #ifdef CONFIG_X86_IO_APIC
 	/*
 	 * Now enable IO-APICs, actually call clear_IO_APIC
-	 * We need clear_IO_APIC before enabling vector on BP
+	 * We need clear_IO_APIC before enabling error vector
 	 */
 	if (!skip_ioapic_setup && nr_ioapics)
 		enable_IO_APIC();
-
-	if (!smp_found_config || skip_ioapic_setup || !nr_ioapics)
-		localise_nmi_watchdog();
-#else
-	localise_nmi_watchdog();
 #endif
+
 	end_local_APIC_setup();
 
 #ifdef CONFIG_X86_IO_APIC
 	if (smp_found_config && !skip_ioapic_setup && nr_ioapics)
 		setup_IO_APIC();
-# ifdef CONFIG_X86_64
-	else
+	else {
 		nr_ioapics = 0;
-# endif
+		localise_nmi_watchdog();
+	}
+#else
+	localise_nmi_watchdog();
 #endif
 
+	setup_boot_clock();
 #ifdef CONFIG_X86_64
-	setup_boot_APIC_clock();
 	check_nmi_watchdog();
-#else
-	setup_boot_clock();
 #endif
 
 	return 0;
--
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