linux-kernel - Re: [RFT PATCH v4 3/5] cpu-topology: Move cpu topology code to common code.

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Date:   Thu, 23 May 2019 10:35:49 +0100
From:   Sudeep Holla <sudeep.holla@....com>
To:     Atish Patra <atish.patra@....com>
Cc:     linux-kernel@...r.kernel.org, Jeffrey Hugo <jhugo@...eaurora.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Andreas Schwab <schwab@...e.de>,
        Anup Patel <anup@...infault.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        devicetree@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Jeremy Linton <jeremy.linton@....com>,
        linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Morten Rasmussen <morten.rasmussen@....com>,
        Otto Sabart <ottosabart@...erm.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will.deacon@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFT PATCH v4 3/5] cpu-topology: Move cpu topology code to
 common code.

On Sat, Apr 27, 2019 at 05:25:27PM -0700, Atish Patra wrote:
> Both RISC-V & ARM64 are using cpu-map device tree to describe
> their cpu topology. It's better to move the relevant code to
> a common place instead of duplicate code.
> 
> Signed-off-by: Atish Patra <atish.patra@....com>
> Tested-by: Jeffrey Hugo <jhugo@...eaurora.org>
> ---
>  arch/arm64/include/asm/topology.h |  23 ---
>  arch/arm64/kernel/topology.c      | 303 +-----------------------------
>  drivers/base/arch_topology.c      | 298 ++++++++++++++++++++++++++++-
>  drivers/base/topology.c           |   1 +
>  include/linux/arch_topology.h     |  28 +++
>  5 files changed, 330 insertions(+), 323 deletions(-)
> 
> -void store_cpu_topology(unsigned int cpuid);
[...]


> diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
> index edfcf8d982e4..2b0758c01cee 100644
> --- a/drivers/base/arch_topology.c
> +++ b/drivers/base/arch_topology.c
> @@ -6,8 +6,8 @@
>   * Written by: Juri Lelli, ARM Ltd.
>   */
>
> -#include <linux/acpi.h>
>  #include <linux/arch_topology.h>
> +#include <linux/acpi.h>

I assume this was to avoid compilation errors, when I rebased I got
conflict and I ordered them back alphabetically as before and hit the
compilation error.

The actual fix would be to include linux/arch_topology.h in linux/topology.h
as you are moving contents of asm/topology.h which it includes.

I did the change and get it tested by kbuild. See [1]

Regards,
Sudeep

[1] https://git.kernel.org/sudeep.holla/linux/h/cpu_topology