diff --git a/[refs] b/[refs]
index ada4db38d843..11ed5ee8c126 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 91612e0df20a52f61db3cac280c153311b36df7a
+refs/heads/master: 45918e1a8bfcabc1cb4570b8df276655020eac45
diff --git a/trunk/kernel/fork.c b/trunk/kernel/fork.c
index 876b31cd822d..a28d11e10877 100644
--- a/trunk/kernel/fork.c
+++ b/trunk/kernel/fork.c
@@ -250,8 +250,9 @@ static inline int dup_mmap(struct mm_struct * mm, struct mm_struct * oldmm)
 
 		/*
 		 * Link in the new vma and copy the page table entries:
-		 * link in first so that swapoff can see swap entries,
-		 * and try_to_unmap_one's find_vma find the new vma.
+		 * link in first so that swapoff can see swap entries.
+		 * Note that, exceptionally, here the vma is inserted
+		 * without holding mm->mmap_sem.
 		 */
 		spin_lock(&mm->page_table_lock);
 		*pprev = tmp;