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

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Message-ID: <c222ba12-6673-0d58-fb2e-9043ce279995@huawei.com>
Date:   Thu, 9 Dec 2021 09:36:18 +0800
From:   Yunfeng Ye <yeyunfeng@...wei.com>
To:     Kefeng Wang <wangkefeng.wang@...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



On 2021/12/8 17:35, Kefeng Wang wrote:
> Delete the first blank line and add your SOB,
> 
Ok, thanks.

> 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;
>>       }
>>
> .
>