diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 3df4aa13291d352c639c50f75d61aacedc7aef4b..d532098d98bfc2430031ba8e3fc79dba4af5c9c7 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -61,6 +61,8 @@ static inline struct thread_info *current_thread_info(void)
 	return (struct thread_info *) S390_lowcore.thread_info;
 }
 
+void arch_release_task_struct(struct task_struct *tsk);
+
 #define THREAD_SIZE_ORDER THREAD_ORDER
 
 #endif