linux-kernel - Re: [PATCH v9 02/12] arm64: barrier: Support smp_cond_load_relaxed

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Message-ID: <87ecmq99d8.fsf@oracle.com>
Date: Wed, 11 Feb 2026 14:57:23 -0800
From: Ankur Arora <ankur.a.arora@...cle.com>
To: Catalin Marinas <catalin.marinas@....com>
Cc: Ankur Arora <ankur.a.arora@...cle.com>, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pm@...r.kernel.org, bpf@...r.kernel.org, arnd@...db.de,
        will@...nel.org, peterz@...radead.org, akpm@...ux-foundation.org,
        mark.rutland@....com, harisokn@...zon.com, cl@...two.org,
        ast@...nel.org, rafael@...nel.org, daniel.lezcano@...aro.org,
        memxor@...il.com, zhenglifeng1@...wei.com, xueshuai@...ux.alibaba.com,
        joao.m.martins@...cle.com, boris.ostrovsky@...cle.com,
        konrad.wilk@...cle.com
Subject: Re: [PATCH v9 02/12] arm64: barrier: Support
 smp_cond_load_relaxed_timeout()


Catalin Marinas <catalin.marinas@....com> writes:

> On Sun, Feb 08, 2026 at 06:31:43PM -0800, Ankur Arora wrote:
>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>> index 93173f0a09c7..239fdca8e2cf 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -22,6 +22,7 @@ config ARM64
>>  	select ARCH_HAS_CACHE_LINE_SIZE
>>  	select ARCH_HAS_CC_PLATFORM
>>  	select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
>> +	select ARCH_HAS_CPU_RELAX
>
> AFAICT, ARCH_HAS_CPU_RELAX is only defined for x86. You can't just
> select it here. Either make the definition global somewhere or add this
> to arm64 Kconfig:
>
> config ARCH_HAS_CPU_RELAX
> 	def_bool y

Ack. I had added config ARCH_HAS_CPU_RELAX in arch/Kconfig
for my test builds but got rid of that when sending out the
series. Will fix.

> Otherwise,
>
> Reviewed-by: Catalin Marinas <catalin.marinas@....com>

Thanks.

--
ankur