linux-kernel - Re: [PATCH v2 2/2] arm64: mm: Use asid feature macro for cheanup

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Date:   Wed, 8 Dec 2021 17:35:47 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Yunfeng Ye <yeyunfeng@...wei.com>, <catalin.marinas@....com>,
        <will@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <wuxu.wu@...wei.com>, Hewenliang <hewenliang4@...wei.com>
Subject: Re: [PATCH v2 2/2] arm64: mm: Use asid feature macro for cheanup

Delete the first blank line and add your SOB,

For series,

Reviewed-by: Kefeng Wang <wangkefeng.wang@...wei.com>

On 2021/12/8 17:17, Yunfeng Ye wrote:
> The commit 95b54c3e4c92 ("KVM: arm64: Add feature register flag
> definitions") introduce the ID_AA64MMFR0_ASID_8 and ID_AA64MMFR0_ASID_16
> macros.
>
> We can use these macros for cheanup in get_cpu_asid_bits().
>
> No functional change.
> ---
>   arch/arm64/mm/context.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
> index bbc2708fe928..b8b4cf0bcf39 100644
> --- a/arch/arm64/mm/context.c
> +++ b/arch/arm64/mm/context.c
> @@ -50,10 +50,10 @@ static u32 get_cpu_asid_bits(void)
>   		pr_warn("CPU%d: Unknown ASID size (%d); assuming 8-bit\n",
>   					smp_processor_id(),  fld);
>   		fallthrough;
> -	case 0:
> +	case ID_AA64MMFR0_ASID_8:
>   		asid = 8;
>   		break;
> -	case 2:
> +	case ID_AA64MMFR0_ASID_16:
>   		asid = 16;
>   	}
>