diff --git a/include/linux/mmap_lock.h b/include/linux/mmap_lock.h
index 45a21faa3ff6..4706c6769902 100644
--- a/include/linux/mmap_lock.h
+++ b/include/linux/mmap_lock.h
@@ -122,12 +122,6 @@ static inline bool mmap_lock_speculate_retry(struct mm_struct *mm, unsigned int
 
 #endif /* CONFIG_PER_VMA_LOCK */
 
-static inline void mmap_init_lock(struct mm_struct *mm)
-{
-	init_rwsem(&mm->mmap_lock);
-	mm_lock_seqcount_init(mm);
-}
-
 static inline void mmap_write_lock(struct mm_struct *mm)
 {
 	__mmap_lock_trace_start_locking(mm, true);
diff --git a/kernel/fork.c b/kernel/fork.c
index f2f9e7b427ad..d4c75428ccaf 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1219,6 +1219,12 @@ static void mm_init_uprobes_state(struct mm_struct *mm)
 #endif
 }
 
+static inline void mmap_init_lock(struct mm_struct *mm)
+{
+	init_rwsem(&mm->mmap_lock);
+	mm_lock_seqcount_init(mm);
+}
+
 static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
 	struct user_namespace *user_ns)
 {