On Wed, 26 Feb 2014 23:39:35 -0500 Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
wrote:
> When we try to walk over inside a vma, walk_page_range() tries to walk
> until vma->vm_end even if a given end is before that point.
> So this patch takes the smaller one as an end address.
>
> ...
>
> --- next-20140220.orig/mm/pagewalk.c
> +++ next-20140220/mm/pagewalk.c
> @@ -321,8 +321,9 @@ int walk_page_range(unsigned long start, unsigned long
> end,
> next = vma->vm_start;
> } else { /* inside the found vma */
> walk->vma = vma;
> - next = vma->vm_end;
> - err = walk_page_test(start, end, walk);
> + next = min_t(unsigned long, end, vma->vm_end);
min_t is unneeded, isn't it? Everything here has type unsigned long.
> + err = walk_page_test(start, next, walk);
> if (skip_lower_level_walking(walk))
> continue;
> if (err)
I'm assuming this is a fix against
pagewalk-update-page-table-walker-core.patch and shall eventually be
folded into that patch.
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