static __cpuinit int threshold_create_bank(unsigned int cpu, int bank)
 {
        int err = 0;
-       struct threshold_bank *b = 0;
+       struct threshold_bank *b = NULL;
 
 #ifdef CONFIG_SMP
        if (cpu_core_id[cpu] && shared_bank[bank]) {    /* symlink */
        if (shared_bank[bank] && atomic_read(&b->kobj.kref.refcount) > 2) {
                sprintf(name, "bank%i", bank);
                sysfs_remove_link(&per_cpu(device_threshold, cpu).kobj, name);
-               per_cpu(threshold_banks, cpu)[bank] = 0;
+               per_cpu(threshold_banks, cpu)[bank] = NULL;
        } else {
                kobject_unregister(&b->kobj);
                kfree(per_cpu(threshold_banks, cpu)[bank]);