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| author | Hugh Dickins <hugh@veritas.com> | 2005-06-21 17:15:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-21 18:46:19 -0700 |
| commit | 45918e1a8bfcabc1cb4570b8df276655020eac45 (patch) | |
| tree | 4caf6a8b634de389e758d2b4c037208f098b3141 /kernel/fork.c | |
| parent | 91612e0df20a52f61db3cac280c153311b36df7a (diff) | |
| download | lwn-45918e1a8bfcabc1cb4570b8df276655020eac45.tar.gz lwn-45918e1a8bfcabc1cb4570b8df276655020eac45.zip | |
[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>
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 876b31cd822d..a28d11e10877 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; |