linux-kernel - [PATCH] x86/acpi: don't call mp_config_acpi_gsi if update

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Date:	Fri, 15 May 2009 12:53:22 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Len Brown <lenb@...nel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>
Subject: [PATCH] x86/acpi: don't call mp_config_acpi_gsi if update_mptable
 is not used



Len doesn't want mp code is called from acpi code.

[ Impact: less touch code flow for acpi code ]

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

---
 arch/x86/include/asm/mpspec.h |    1 +
 arch/x86/kernel/acpi/boot.c   |    4 +++-
 arch/x86/kernel/mpparse.c     |    2 +-
 3 files changed, 5 insertions(+), 2 deletions(-)

Index: linux-2.6/arch/x86/include/asm/mpspec.h
===================================================================
--- linux-2.6.orig/arch/x86/include/asm/mpspec.h
+++ linux-2.6/arch/x86/include/asm/mpspec.h
@@ -72,6 +72,7 @@ extern void mp_register_ioapic(int id, u
 extern void mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
 				   u32 gsi);
 extern void mp_config_acpi_legacy_irqs(void);
+extern int enable_update_mptable;
 struct device;
 extern int mp_register_gsi(struct device *dev, u32 gsi, int edge_level,
 				 int active_high_low);
Index: linux-2.6/arch/x86/kernel/acpi/boot.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/acpi/boot.c
+++ linux-2.6/arch/x86/kernel/acpi/boot.c
@@ -1226,7 +1226,9 @@ int mp_register_gsi(struct device *dev,
 		       ioapic_pin);
 		return gsi;
 	}
-	mp_config_acpi_gsi(dev, gsi, trigger, polarity);
+
+	if (enable_update_mptable)
+		mp_config_acpi_gsi(dev, gsi, trigger, polarity);
 
 	set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
 			     trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,
Index: linux-2.6/arch/x86/kernel/mpparse.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/mpparse.c
+++ linux-2.6/arch/x86/kernel/mpparse.c
@@ -957,7 +957,7 @@ out:
 	return 0;
 }
 
-static int __initdata enable_update_mptable;
+int enable_update_mptable;
 
 static int __init update_mptable_setup(char *str)
 {
--
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