linux-kernel - Re: [PATCH v5 01/18] ARM64: Move the init of cpu_logical_map(0) before unflatten_device

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Date:	Tue, 18 Nov 2014 21:45:49 +0800
From:	Hanjun Guo <hanjun.guo@...aro.org>
To:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>
CC:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Mark Rutland <mark.rutland@....com>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Sudeep Holla <Sudeep.Holla@....com>,
	Jon Masters <jcm@...hat.com>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Robert Richter <rric@...nel.org>,
	Lv Zheng <lv.zheng@...el.com>,
	Robert Moore <robert.moore@...el.com>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Randy Dunlap <rdunlap@...radead.org>,
	Charles.Garcia-Tobin@....com, Kangkang.Shen@...wei.com,
	linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org
Subject: Re: [PATCH v5 01/18] ARM64: Move the init of cpu_logical_map(0) before
 unflatten_device_tree()

Hi Catalin,

On 2014年10月17日 21:36, Hanjun Guo wrote:
> It always make sense to initialize CPU0's logical map entry from the
> hardware values, so move the initialization of cpu_logical_map(0)
> before unflatten_device_tree() which is needed by ACPI code later.
>
> Acked-by: Olof Johansson <olof@...om.net>
> Acked-by: Mark Rutland <mark.rutland@....com>
> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>

Could you merge this patch first in 3.19? It was acked by Olof and
Mark, and it will make sense without ACPI too.

Thanks
Hanjun

> ---
>   arch/arm64/kernel/setup.c |    2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> index edb146d..8f33f72 100644
> --- a/arch/arm64/kernel/setup.c
> +++ b/arch/arm64/kernel/setup.c
> @@ -393,11 +393,11 @@ void __init setup_arch(char **cmdline_p)
>
>   	efi_idmap_init();
>
> +	cpu_logical_map(0) = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
>   	unflatten_device_tree();
>
>   	psci_init();
>
> -	cpu_logical_map(0) = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
>   	cpu_read_bootcpu_ops();
>   #ifdef CONFIG_SMP
>   	smp_init_cpus();
>
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