Index: arch/ppc64/include/proc/task.h
===================================================================
--- arch/ppc64/include/proc/task.h	(revision c034b164fce2965ed6484d251876ad7e153978a3)
+++ arch/ppc64/include/proc/task.h	(revision b65caba198c5e73a38a403befaabc8928f0b3558)
@@ -34,4 +34,5 @@
 
 #define task_create_arch(t)
+#define task_destroy_arch(t)
 
 #endif