[PATCH] dup_mmap: update comment on new vma
Remove part of comment on linking new vma in dup_mmap: since anon_vma rmap
came in, try_to_unmap_one knows the vma without needing find_vma. But add
a comment to note that here vma is inserted without mmap_sem.
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/kernel/fork.c b/kernel/fork.c
index 876b31c..a28d11e 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -250,8 +250,9 @@
/*
* 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;