diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index 108ede99e533..44c6f15800ff 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -39,6 +39,8 @@ void __noreturn do_task_dead(void);
 
 extern void proc_caches_init(void);
 
+extern void fork_init(void);
+
 extern void release_task(struct task_struct * p);
 
 #ifdef CONFIG_HAVE_COPY_THREAD_TLS
diff --git a/init/main.c b/init/main.c
index 020972fed117..38a603f62b7b 100644
--- a/init/main.c
+++ b/init/main.c
@@ -105,7 +105,6 @@
 static int kernel_init(void *);
 
 extern void init_IRQ(void);
-extern void fork_init(void);
 extern void radix_tree_init(void);
 
 /*
diff --git a/kernel/fork.c b/kernel/fork.c
index aef1430bdce0..8cb5cd7c97e1 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -163,10 +163,6 @@ static inline void free_task_struct(struct task_struct *tsk)
 }
 #endif
 
-void __weak arch_release_thread_stack(unsigned long *stack)
-{
-}
-
 #ifndef CONFIG_ARCH_THREAD_STACK_ALLOCATOR
 
 /*
@@ -376,7 +372,6 @@ static void release_task_stack(struct task_struct *tsk)
 		return;  /* Better to leak the stack than to free prematurely */
 
 	account_kernel_stack(tsk, -1);
-	arch_release_thread_stack(tsk->stack);
 	free_thread_stack(tsk);
 	tsk->stack = NULL;
 #ifdef CONFIG_VMAP_STACK