diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 003619fab20e..2419e60c9a7f 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -1324,6 +1324,9 @@ struct vm_special_mapping {
 
 	int (*mremap)(const struct vm_special_mapping *sm,
 		     struct vm_area_struct *new_vma);
+
+	void (*close)(const struct vm_special_mapping *sm,
+		      struct vm_area_struct *vma);
 };
 
 enum tlb_flush_reason {
diff --git a/mm/mmap.c b/mm/mmap.c
index 4a9c2329b09a..933fdc1491a7 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2045,10 +2045,16 @@ void vm_stat_account(struct mm_struct *mm, vm_flags_t flags, long npages)
 static vm_fault_t special_mapping_fault(struct vm_fault *vmf);
 
 /*
+ * Close hook, called for unmap() and on the old vma for mremap().
+ *
  * Having a close hook prevents vma merging regardless of flags.
  */
 static void special_mapping_close(struct vm_area_struct *vma)
 {
+	const struct vm_special_mapping *sm = vma->vm_private_data;
+
+	if (sm->close)
+		sm->close(sm, vma);
 }
 
 static const char *special_mapping_name(struct vm_area_struct *vma)