On Wed, 4 May 2022 00:39:57 +0000 Wei Yang <richard.weiyang@xxxxxxxxx> wrote:
> If we can't find a proper vma, the loop would terminate as expected.
>
> It's not necessary to handle it specially.
>
> ...
>
> --- a/mm/mlock.c
> +++ b/mm/mlock.c
> @@ -504,11 +504,7 @@ static unsigned long count_mm_mlocked_page_nr(struct mm_struct *mm,
> if (mm == NULL)
> mm = current->mm;
>
> - vma = find_vma(mm, start);
> - if (vma == NULL)
> - return 0;
> -
> - for (; vma ; vma = vma->vm_next) {
> + for (vma = find_vma(mm, start); vma ; vma = vma->vm_next) {
> if (start >= vma->vm_end)
> continue;
> if (start + len <= vma->vm_start)
The mapletree patches mangle this code a lot.
Please take a look at linux-next or the mm-unstabe branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm early to mid next
week, see if you see anything which should be addressed.
