From: Russ Anderson <rja@sgi.com>
Subject: [PATCH] sgi_uv: Don't publish /sys/firmware/sgi_uv on !uv systems
References: bnc#482506
Patch-mainline: Submitted Mar 6 2009 by SGI

 MPT testing of sles11 found /sys/firmware/sgi_uv gets created on non-UV x86_64
 systems.  This confuses MPT which uses /sys/firmware/sgi_uv to indicate the
 platform is a UV system.

Acked-by: Jeff Mahoney <jeffm@suse.com>
---

 arch/x86/kernel/uv_sysfs.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/arch/x86/kernel/uv_sysfs.c
+++ b/arch/x86/kernel/uv_sysfs.c
@@ -21,6 +21,7 @@
 
 #include <linux/sysdev.h>
 #include <asm/uv/bios.h>
+#include <asm/genapic.h>
 
 struct kobject *sgi_uv_kobj;
 
@@ -46,6 +47,9 @@
 static int __init sgi_uv_sysfs_init(void)
 {
 	unsigned long ret;
+
+	if (!is_uv_system())
+		return -ENODEV;
 
 	if (!sgi_uv_kobj)
 		sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);