linux-kernel - [PATCH v2 11/12] ACPI: processor: push file static MADT pointer into internal map_madt

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Date:	Mon, 22 Feb 2010 12:12:00 -0700
From:	Alex Chiang <achiang@...com>
To:	lenb@...nel.org
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
Subject: [PATCH v2 11/12] ACPI: processor: push file static MADT pointer into
	internal map_madt_entry()

There's no real need for a pointer to the MADT to be global. The only
function who uses it is map_madt_entry.

This allows us to remove some more ugly #ifdefs.

Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
Signed-off-by: Alex Chiang <achiang@...com>
---

 drivers/acpi/processor_core.c |   18 +++++++++---------
 1 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index ee9bce1..791ac7b 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -43,8 +43,6 @@ static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = {
 };
 
 #ifdef CONFIG_SMP
-static struct acpi_table_madt *madt;
-
 static int map_lapic_id(struct acpi_subtable_header *entry,
 		 u32 acpi_id, int *apic_id)
 {
@@ -100,8 +98,17 @@ static int map_lsapic_id(struct acpi_subtable_header *entry,
 static int map_madt_entry(int type, u32 acpi_id)
 {
 	unsigned long madt_end, entry;
+	static struct acpi_table_madt *madt;
+	static int read_madt;
 	int apic_id = -1;
 
+	if (!read_madt) {
+		if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
+					(struct acpi_table_header **)&madt)))
+			madt = NULL;
+		read_madt++;
+	}
+
 	if (!madt)
 		return apic_id;
 
@@ -335,13 +342,6 @@ early_init_pdc(acpi_handle handle, u32 lvl, void *context, void **rv)
 
 void __init acpi_early_processor_set_pdc(void)
 {
-
-#ifdef CONFIG_SMP
-	if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0,
-				(struct acpi_table_header **)&madt)))
-		madt = NULL;
-#endif
-
 	/*
 	 * Check whether the system is DMI table. If yes, OSPM
 	 * should not use mwait for CPU-states.

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