From: Kurt Garloff <garloff@suse.de>
Subject: Store SRAT table revision

In SRAT v1, we had 8bit proximity domain (PXM) fields; SRAT v2 provides
32bits for these. The new fields were reserved before.
According to the ACPI spec, the OS must disregard reserved fields.
In order to know whether to disregard or not, we must know what 
version the SRAT table has.

This patch stores the SRAT table revision for later consumption
by arch specific __init functions.

This is patch 1/3.

Signed-off-by: Kurt Garloff <garloff@suse.de>

diff -r a28eb89d1fe1 drivers/acpi/numa.c
--- a/drivers/acpi/numa.c	Tue Jul 14 02:00:45 2009 +0000
+++ b/drivers/acpi/numa.c	Tue Jul 14 16:44:35 2009 +0200
@@ -42,6 +42,8 @@
 static int node_to_pxm_map[MAX_NUMNODES]
 				= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
 
+unsigned char acpi_srat_revision __initdata;
+
 int pxm_to_node(int pxm)
 {
 	if (pxm < 0)
@@ -266,6 +268,7 @@
 		return -EINVAL;
 
 	srat = (struct acpi_table_srat *)table;
+	acpi_srat_revision = srat->header.revision;
 
 	return 0;
 }
diff -r a28eb89d1fe1 include/acpi/acpi_numa.h
--- a/include/acpi/acpi_numa.h	Tue Jul 14 02:00:45 2009 +0000
+++ b/include/acpi/acpi_numa.h	Tue Jul 14 16:44:35 2009 +0200
@@ -15,6 +15,7 @@
 extern int node_to_pxm(int);
 extern void __acpi_map_pxm_to_node(int, int);
 extern int acpi_map_pxm_to_node(int);
+extern unsigned char acpi_srat_revision;
 
 #endif				/* CONFIG_ACPI_NUMA */
 #endif				/* __ACP_NUMA_H */