diff --git a/lib/smp_processor_id.c b/lib/smp_processor_id.c
index 4689cb0..503f087 100644
--- a/lib/smp_processor_id.c
+++ b/lib/smp_processor_id.c
@@ -22,7 +22,7 @@
 	 * Kernel threads bound to a single CPU can safely use
 	 * smp_processor_id():
 	 */
-	if (cpumask_equal(&current->cpus_allowed, cpumask_of(this_cpu)))
+	if (cpumask_equal(tsk_cpus_allowed(current), cpumask_of(this_cpu)))
 		goto out;
 
 	/*