diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 5bb3cc66cccc..56d5ab70bfa1 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -823,7 +823,7 @@ void __init poking_init(void)
 	spinlock_t *ptl;
 	pte_t *ptep;
 
-	poking_mm = copy_init_mm();
+	poking_mm = mm_alloc();
 	BUG_ON(!poking_mm);
 
 	/* Xen PV guests need the PGD to be pinned. */
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index d351f1b362ef..a702d4d1a495 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -87,7 +87,6 @@ extern void exit_itimers(struct task_struct *);
 extern pid_t kernel_clone(struct kernel_clone_args *kargs);
 struct task_struct *create_io_thread(int (*fn)(void *), void *arg, int node);
 struct task_struct *fork_idle(int);
-struct mm_struct *copy_init_mm(void);
 extern pid_t kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
 extern long kernel_wait4(pid_t, int __user *, int, struct rusage *);
 int kernel_wait(pid_t pid, int *stat);
diff --git a/kernel/fork.c b/kernel/fork.c
index 1906230a000e..0835c3e89311 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2522,11 +2522,6 @@ struct task_struct * __init fork_idle(int cpu)
 	return task;
 }
 
-struct mm_struct *copy_init_mm(void)
-{
-	return dup_mm(NULL, &init_mm);
-}
-
 /*
  * This is like kernel_clone(), but shaved down and tailored to just
  * creating io_uring workers. It returns a created task, or an error pointer.