[PATCH] i386: CONFIG_ACPI_SRAT on non-acpi hw

[Magnus Damm <magnus@valinux.co.jp>]

This patch for 2.6.14-rc1 adds code to check the return value of 
acpi_find_root_pointer(). Without this patch systems without ACPI support
such as QEMU crashes when booting a NUMA kernel with CONFIG_ACPI_SRAT=y.

Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
----

--- from-0002/arch/i386/kernel/srat.c
+++ to-0003/arch/i386/kernel/srat.c	2005-09-16 15:22:48.000000000 +0900
@@ -327,7 +327,12 @@ int __init get_memcfg_from_srat(void)
 	int tables = 0;
 	int i = 0;
 
-	acpi_find_root_pointer(ACPI_PHYSICAL_ADDRESSING, rsdp_address);
+	if (ACPI_FAILURE(acpi_find_root_pointer(ACPI_PHYSICAL_ADDRESSING, 
+						rsdp_address))) {
+		printk("%s: System description tables not found\n",
+		       __FUNCTION__);
+		goto out_err;
+	}
 
 	if (rsdp_address->pointer_type == ACPI_PHYSICAL_POINTER) {
 		printk("%s: assigning address to rsdp\n", __FUNCTION__);
-
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