linux-kernel - Re: [PATCH] LoongArch: Remove unused option with HAVE_VIRT_CPU_ACCOUNTING

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Message-ID: <2a5a2453-0686-efb2-29aa-065797fa1548@loongson.cn>
Date: Mon, 24 Feb 2025 09:17:26 +0800
From: bibo mao <maobibo@...ngson.cn>
To: Huacai Chen <chenhuacai@...nel.org>
Cc: WANG Xuerui <kernel@...0n.name>, loongarch@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] LoongArch: Remove unused option with
 HAVE_VIRT_CPU_ACCOUNTING_GEN



On 2025/2/21 下午9:42, Huacai Chen wrote:
> Hi, Bibo,
> 
> On Fri, Feb 21, 2025 at 3:32 PM Bibo Mao <maobibo@...ngson.cn> wrote:
>>
>> Option HAVE_VIRT_CPU_ACCOUNTING_GEN is selected by default in kconfig file
>> arch/Kconfig. It is meaningless in file arch/loongarch/Kconfig, and on the
>> contrast it may bring out misunderstanding. Here remove it on arch
>> specified kconfig file.
>>
>> Signed-off-by: Bibo Mao <maobibo@...ngson.cn>
>> ---
>>   arch/loongarch/Kconfig | 1 -
>>   1 file changed, 1 deletion(-)
>>
>> diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
>> index 2b8bd27a852f..7fd5708fe14a 100644
>> --- a/arch/loongarch/Kconfig
>> +++ b/arch/loongarch/Kconfig
>> @@ -175,7 +175,6 @@ config LOONGARCH
>>          select HAVE_STACKPROTECTOR
>>          select HAVE_SYSCALL_TRACEPOINTS
>>          select HAVE_TIF_NOHZ
>> -       select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP
> Please see 01f135506e2ed0403512 ("powerpc/32: select
> HAVE_VIRT_CPU_ACCOUNTING_GEN"). Now HAVE_VIRT_CPU_ACCOUNTING_GEN is
> available on both 32BIT and 64BIT, so I think a better solution is
> unconditionally select HAVE_VIRT_CPU_ACCOUNTING_GEN which is
> convenient for the upcoming LoongArch32.
I have no idea about LoongArch32 which is talked about years, however 
there is never actual code posted and no detailed plan. All about 
LoongArch32 is talking on the paper.

Regards
Bibo Mao
> 
> 
> 
> 
> 
> Huacai
> 
>>          select IRQ_FORCED_THREADING
>>          select IRQ_LOONGARCH_CPU
>>          select LOCK_MM_AND_FIND_VMA
>> --
>> 2.39.3
>>
>>