linux-kernel - Re: [PATCH] riscv: Use p*d_leaf macros to define p*d

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Date:   Thu, 20 Feb 2020 11:42:44 +0530
From:   Anup Patel <anup@...infault.org>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] riscv: Use p*d_leaf macros to define p*d_huge

On Thu, Feb 20, 2020 at 11:41 AM Alexandre Ghiti <alex@...ti.fr> wrote:
>
> The newly introduced p*d_leaf macros allow to check if an entry of the
> page table map to a physical page instead of the next level. To avoid
> duplication of code, use those macros to determine if a page table entry
> points to a hugepage.
>
> Suggested-by: Paul Walmsley <paul.walmsley@...ive.com>
> Signed-off-by: Alexandre Ghiti <alex@...ti.fr>
> ---
>  arch/riscv/mm/hugetlbpage.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/arch/riscv/mm/hugetlbpage.c b/arch/riscv/mm/hugetlbpage.c
> index 0d4747e9d5b5..a6189ed36c5f 100644
> --- a/arch/riscv/mm/hugetlbpage.c
> +++ b/arch/riscv/mm/hugetlbpage.c
> @@ -4,14 +4,12 @@
>
>  int pud_huge(pud_t pud)
>  {
> -       return pud_present(pud) &&
> -               (pud_val(pud) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
> +       return pud_leaf(pud);
>  }
>
>  int pmd_huge(pmd_t pmd)
>  {
> -       return pmd_present(pmd) &&
> -               (pmd_val(pmd) & (_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC));
> +       return pmd_leaf(pmd);
>  }
>
>  static __init int setup_hugepagesz(char *opt)
> --
> 2.20.1
>

Looks good to me.

Reviewed-by: Anup Patel <anup@...infault.org>

Regards,
Anup