Re: [PATCH 3/3] mm/page_table_check: use unsigned long for page counters

[Wei Xu <weixugc@google.com>]

On Wed, Jan 19, 2022 at 8:25 PM Pasha Tatashin
<pasha.tatashin@soleen.com> wrote:
>
> For the consistency, use "unsigned long" for all page counters.
>
> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
> ---
>  mm/page_table_check.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/mm/page_table_check.c b/mm/page_table_check.c
> index 2341ac382cd5..22dd285ab8d5 100644
> --- a/mm/page_table_check.c
> +++ b/mm/page_table_check.c
> @@ -86,8 +86,8 @@ static void page_table_check_clear(struct mm_struct *mm, unsigned long addr,
>  {
>         struct page_ext *page_ext;
>         struct page *page;
> +       unsigned long i;
>         bool anon;
> -       int i;
>
>         if (!pfn_valid(pfn))
>                 return;
> @@ -121,8 +121,8 @@ static void page_table_check_set(struct mm_struct *mm, unsigned long addr,
>  {
>         struct page_ext *page_ext;
>         struct page *page;
> +       unsigned long i;
>         bool anon;
> -       int i;
>
>         if (!pfn_valid(pfn))
>                 return;
> @@ -186,10 +186,10 @@ static void pmd_clear_level(struct mm_struct *mm, unsigned long addr,
>  void __page_table_check_zero(struct page *page, unsigned int order)
>  {
>         struct page_ext *page_ext = lookup_page_ext(page);
> -       int i;
> +       unsigned long i;
>
>         BUG_ON(!page_ext);
> -       for (i = 0; i < (1 << order); i++) {
> +       for (i = 0; i < (1ul << order); i++) {
>                 struct page_table_check *ptc = get_page_table_check(page_ext);
>
>                 BUG_ON(atomic_read(&ptc->anon_map_count));
> --
> 2.34.1.703.g22d0c6ccf7-goog
>

Reviewed-by: Wei Xu <weixugc@google.com>