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authorHugh Dickins <hugh@veritas.com>2005-06-21 17:15:08 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-21 18:46:19 -0700
commit45918e1a8bfcabc1cb4570b8df276655020eac45 (patch)
tree4caf6a8b634de389e758d2b4c037208f098b3141
parent91612e0df20a52f61db3cac280c153311b36df7a (diff)
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[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>
-rw-r--r--kernel/fork.c5
1 files changed, 3 insertions, 2 deletions
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 @@ 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;
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