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 <[email protected]>
---
kernel/fork.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
--- 2.6.12-rc6/kernel/fork.c 2005-05-25 18:09:19.000000000 +0100
+++ linux/kernel/fork.c 2005-06-04 20:41:55.000000000 +0100
@@ -249,8 +249,9 @@ static inline int dup_mmap(struct mm_str
/*
* 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;
-
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