linux-kernel - [PATCH] x86, ioapic: Add debug printing when mapping for ioapic

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Date:	Mon, 25 Oct 2010 09:55:30 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: [PATCH] x86, ioapic: Add debug printing when mapping for ioapic


It is in mp_register_ioapic().

Signed-off-by: Yinghai Lu <yinghai@...nel.org>

---
 arch/x86/kernel/apic/io_apic.c |   11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

Index: linux-2.6/arch/x86/kernel/apic/io_apic.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/io_apic.c
+++ linux-2.6/arch/x86/kernel/apic/io_apic.c
@@ -4068,6 +4068,9 @@ void __init mp_register_ioapic(int id, u
 	mp_ioapics[idx].apicaddr = address;
 
 	set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
+	apic_printk(APIC_VERBOSE, "mapped IOAPIC to %08lx (%08x)\n",
+			__fix_to_virt(FIX_IO_APIC_BASE_0 + idx) + (address & ~PAGE_MASK),
+			address);
 	mp_ioapics[idx].apicid = io_apic_unique_id(id);
 	mp_ioapics[idx].apicver = io_apic_get_version(idx);
 
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