diff --git a/include/linux/mm.h b/include/linux/mm.h
index c17e5cfc1e4726f74f7d28c238714909f3b67b2c..4d7245e6802a6582e236a1baf2c0a15e94c29f5f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -532,6 +532,10 @@ enum page_entry_size {
  */
 struct vm_operations_struct {
 	void (*open)(struct vm_area_struct * area);
+	/**
+	 * @close: Called when the VMA is being removed from the MM.
+	 * Context: User context.  May sleep.  Caller holds mmap_lock.
+	 */
 	void (*close)(struct vm_area_struct * area);
 	/* Called any time before splitting to check if it's allowed */
 	int (*may_split)(struct vm_area_struct *area, unsigned long addr);