On Mon, Sep 27, 2010 at 9:37 AM, Pekka Enberg <penberg@xxxxxxxxxx> wrote:
>>> On Sun, Sep 26, 2010 at 2:34 AM, Eric W. Biederman
>>> <ebiederm@xxxxxxxxxxxx> wrote:
>>>> Consolidate vma destruction in remove_vma. This is slightly
>>>> better for code size and for code maintenance. Avoiding the pain
>>>> of 3 copies of everything needed to tear down a vma.
>>>>
>>>> Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxxxxxxxx>
>>>> ---
>>>> mm/mmap.c | 21 +++++----------------
>>>> 1 files changed, 5 insertions(+), 16 deletions(-)
>>>>
>>>> diff --git a/mm/mmap.c b/mm/mmap.c
>>>> index 6128dc8..17dd003 100644
>>>> --- a/mm/mmap.c
>>>> +++ b/mm/mmap.c
>>>> @@ -643,16 +643,10 @@ again: remove_next = 1 + (end > next->vm_end);
>>>> spin_unlock(&mapping->i_mmap_lock);
>>>>
>>>> if (remove_next) {
>>>> - if (file) {
>>>> - fput(file);
>>>> - if (next->vm_flags & VM_EXECUTABLE)
>>>> - removed_exe_file_vma(mm);
>>>> - }
>>>> if (next->anon_vma)
>>>> anon_vma_merge(vma, next);
>>>> + remove_vma(next);
>>>
>>> remove_vma() does vma->vm_ops->close() but we don't do that here. Are
>>> you sure the conversion is safe?
>
> Definitely. It actually isn't possible to reach that point with a
> vma that has a close method.
>
> Until I had traced through all of the code paths I suspect calling
> remove_vma there might have been a bug fix.
Can we amend that to the changelog, please? Otherwise
Acked-by: Pekka Enberg <penberg@xxxxxxxxxx>
Pekka
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