From: Russ Anderson <rja@sgi.com>
Date: Fri, 3 Apr 2009 22:24:23 +0000 (-0500)
Subject: x86: prevent /sys/firmware/sgi_uv from being created on non-uv systems
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=06aa05b307e8efbc278f201198e7cdf3877bc5c2;p=linux-beck.git

x86: prevent /sys/firmware/sgi_uv from being created on non-uv systems

/sys/firmware/sgi_uv should only be created on uv systems.

Signed-off-by: Russ Anderson <rja@sgi.com>
LKML-Reference: <20090403222423.GA28546@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/kernel/uv_sysfs.c b/arch/x86/kernel/uv_sysfs.c
index 67f9b9dbf800..36afb98675a4 100644
--- 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/uv/uv.h>
 
 struct kobject *sgi_uv_kobj;
 
@@ -47,6 +48,9 @@ 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);
 	if (!sgi_uv_kobj) {