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From: Kent Overstreet <kent.overstreet@linux.dev>
To: Suren Baghdasaryan <surenb@google.com>
Subject: Re: [RFC PATCH RESEND 23/28] x86/mm: define
 ARCH_SUPPORTS_PER_VMA_LOCK
Message-ID: <20220901202052.xfaeuhmosheml2gz@moria.home.lan>
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 <20220901173516.702122-24-surenb@google.com>
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On Thu, Sep 01, 2022 at 10:35:11AM -0700, Suren Baghdasaryan wrote:
> Set ARCH_SUPPORTS_PER_VMA_LOCK so that the per-VMA lock support can be
> compiled on this architecture.
> 
> Signed-off-by: Suren Baghdasaryan <surenb@google.com>
> ---
>  arch/x86/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index f9920f1341c8..ee19de020b27 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -27,6 +27,7 @@ config X86_64
>  	# Options that are inherently 64-bit kernel only:
>  	select ARCH_HAS_GIGANTIC_PAGE
>  	select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
> +	select ARCH_SUPPORTS_PER_VMA_LOCK
>  	select ARCH_USE_CMPXCHG_LOCKREF
>  	select HAVE_ARCH_SOFT_DIRTY
>  	select MODULES_USE_ELF_RELA

I think you could combine this with the previous path (and similarly on other
architectures) - they logically go together.