1 files changed, 14 insertions, 7 deletions

diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index ba0b94a..99b5717 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -523,10 +523,12 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 {
 	int i, err = 0;
 	struct threshold_bank *b = NULL;
+	struct device *dev = per_cpu(mce_device, cpu);
 	char name[32];
 
 	sprintf(name, "threshold_bank%i", bank);
 
+#ifdef CONFIG_SMP
 	if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) {	/* symlink */
 		i = cpumask_first(cpu_llc_shared_mask(cpu));
 
@@ -543,8 +545,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 		if (!b)
 			goto out;
 
-		err = sysfs_create_link(&per_cpu(mce_device, cpu).kobj,
-					b->kobj, name);
+		err = sysfs_create_link(&dev->kobj, b->kobj, name);
 		if (err)
 			goto out;
 
@@ -553,6 +554,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 
 		goto out;
 	}
+#endif
 
 	b = kzalloc(sizeof(struct threshold_bank), GFP_KERNEL);
 	if (!b) {
@@ -565,7 +567,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 		goto out;
 	}
 
-	b->kobj = kobject_create_and_add(name, &per_cpu(mce_device, cpu).kobj);
+	b->kobj = kobject_create_and_add(name, &dev->kobj);
 	if (!b->kobj)
 		goto out_free;
 
@@ -585,8 +587,9 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 		if (i == cpu)
 			continue;
 
-		err = sysfs_create_link(&per_cpu(mce_device, i).kobj,
-					b->kobj, name);
+		dev = per_cpu(mce_device, i);
+		if (dev)
+			err = sysfs_create_link(&dev->kobj,b->kobj, name);
 		if (err)
 			goto out;
 
@@ -649,6 +652,7 @@ static void deallocate_threshold_block(unsigned int cpu,
 static void threshold_remove_bank(unsigned int cpu, int bank)
 {
 	struct threshold_bank *b;
+	struct device *dev;
 	char name[32];
 	int i = 0;
 
@@ -663,7 +667,8 @@ static void threshold_remove_bank(unsigned int cpu, int bank)
 #ifdef CONFIG_SMP
 	/* sibling symlink */
 	if (shared_bank[bank] && b->blocks->cpu != cpu) {
-		sysfs_remove_link(&per_cpu(mce_device, cpu).kobj, name);
+		dev = per_cpu(mce_device, cpu);
+		sysfs_remove_link(&dev->kobj, name);
 		per_cpu(threshold_banks, cpu)[bank] = NULL;
 
 		return;
@@ -675,7 +680,9 @@ static void threshold_remove_bank(unsigned int cpu, int bank)
 		if (i == cpu)
 			continue;
 
-		sysfs_remove_link(&per_cpu(mce_device, i).kobj, name);
+		dev = per_cpu(mce_device, i);
+		if (dev)
+			sysfs_remove_link(&dev->kobj, name);
 		per_cpu(threshold_banks, i)[bank] = NULL;
 	}