linux-kernel - Re: [PATCH] riscv/mm: Fix the comment for swap pte format

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Date:   Thu, 21 Sep 2023 16:21:17 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Xiao Wang <xiao.w.wang@...el.com>, paul.walmsley@...ive.com,
        palmer@...belt.com, aou@...s.berkeley.edu
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] riscv/mm: Fix the comment for swap pte format

On 21.09.23 16:16, Xiao Wang wrote:
> Swap type takes bits 7-11 and swap offset should start from bit 12.
> 
> Signed-off-by: Xiao Wang <xiao.w.wang@...el.com>
> ---
>   arch/riscv/include/asm/pgtable.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
> index e05b5dc1f0cb..e94a2998e81e 100644
> --- a/arch/riscv/include/asm/pgtable.h
> +++ b/arch/riscv/include/asm/pgtable.h
> @@ -812,7 +812,7 @@ extern pmd_t pmdp_collapse_flush(struct vm_area_struct *vma,
>    *	bit            5:	_PAGE_PROT_NONE (zero)
>    *	bit            6:	exclusive marker
>    *	bits      7 to 11:	swap type
> - *	bits 11 to XLEN-1:	swap offset
> + *	bits 12 to XLEN-1:	swap offset
>    */
>   #define __SWP_TYPE_SHIFT	7
>   #define __SWP_TYPE_BITS		5

Reviewed-by: David Hildenbrand <david@...hat.com>

-- 
Cheers,

David / dhildenb