From 45918e1a8bfcabc1cb4570b8df276655020eac45 Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Tue, 21 Jun 2005 17:15:08 -0700 Subject: [PATCH] [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/fork.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/fork.c b/kernel/fork.c index 876b31cd822..a28d11e1087 100644 --- a/kernel/fork.c +++ b/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; -- 2.20.1