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Subject: Re: [PATCH] ACPI / NUMA: Add stub function for pxm_to_node
To:     Nathan Chancellor <natechancellor@gmail.com>,
        Robert Moore <robert.moore@intel.com>,
        Erik Kaneda <erik.kaneda@intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Len Brown <lenb@kernel.org>
Cc:     Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        linux-acpi@vger.kernel.org, devel@acpica.org,
        linux-kernel@vger.kernel.org
References: <20200928194554.3423466-1-natechancellor@gmail.com>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <c313dcd3-7fab-00eb-15f2-65a3a51f7bd5@infradead.org>
Date:   Tue, 29 Sep 2020 13:13:24 -0700
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On 9/28/20 12:45 PM, Nathan Chancellor wrote:
> After commit 01feba590cd6 ("ACPI: Do not create new NUMA domains from
> ACPI static tables that are not SRAT"):
> 
> $ scripts/config --file arch/x86/configs/x86_64_defconfig -d NUMA -e ACPI_NFIT
> 
> $ make -skj"$(nproc)" distclean defconfig drivers/acpi/nfit/
> drivers/acpi/nfit/core.c: In function ‘acpi_nfit_register_region’:
> drivers/acpi/nfit/core.c:3010:27: error: implicit declaration of
> function ‘pxm_to_node’; did you mean ‘xa_to_node’?
> [-Werror=implicit-function-declaration]
>  3010 |   ndr_desc->target_node = pxm_to_node(spa->proximity_domain);
>       |                           ^~~~~~~~~~~
>       |                           xa_to_node
> cc1: some warnings being treated as errors
> ...
> 
> Add a stub function like acpi_map_pxm_to_node had so that the build
> continues to work.
> 
> Fixes: 01feba590cd6 ("ACPI: Do not create new NUMA domains from ACPI static tables that are not SRAT")
> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> ---
> 
> I am not sure if this is the right place or value for this. It looks
> like there is going to be another stub function added here, which is
> going through -mm:
> 
> https://lkml.kernel.org/r/159643094925.4062302.14979872973043772305.stgit@dwillia2-desk3.amr.corp.intel.com
> 
>  include/acpi/acpi_numa.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/acpi/acpi_numa.h b/include/acpi/acpi_numa.h
> index fdebcfc6c8df..09eb3bc20ff5 100644
> --- a/include/acpi/acpi_numa.h
> +++ b/include/acpi/acpi_numa.h
> @@ -22,5 +22,10 @@ extern int acpi_numa __initdata;
>  extern void bad_srat(void);
>  extern int srat_disabled(void);
>  
> +#else				/* CONFIG_ACPI_NUMA */
> +static inline int pxm_to_node(int pxm)
> +{
> +	return 0;
> +}
>  #endif				/* CONFIG_ACPI_NUMA */
>  #endif				/* __ACP_NUMA_H */
> 
> base-commit: eb6335b68ce3fc85a93c4c6cd3bb6bc5ac490efe

OK, that works/builds. It doesn't quite apply cleanly to linux-next-20200929
but that's a minor detail and easy to get around.

Thanks.

Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested

-- 
~Randy