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From: Michael Ellerman <mpe@ellerman.id.au>
To: Rob Herring <robh@kernel.org>,
	Russell King <linux@armlinux.org.uk>,
	James Morse <james.morse@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Guo Ren <guoren@kernel.org>,
	Jonas Bonn <jonas@southpole.se>,
	Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>,
	Stafford Horne <shorne@gmail.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Rich Felker <dalias@libc.org>,
	x86@kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Florian Fainelli <f.fainelli@gmail.com>,
	Ray Jui <rjui@broadcom.com>,
	Scott Branden <sbranden@broadcom.com>,
	bcm-kernel-feedback-list@broadcom.com,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Frank Rowand <frowand.list@gmail.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org,
	openrisc@lists.librecores.org, linuxppc-dev@lists.ozlabs.org,
	linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org,
	devicetree@vger.kernel.org
Subject: Re: [PATCH 07/12] powerpc: Use of_get_cpu_hwid()
Date: Fri, 08 Oct 2021 22:01:15 +1100	[thread overview]
Message-ID: <8735pbok5g.fsf@mpe.ellerman.id.au> (raw)
In-Reply-To: <20211006164332.1981454-8-robh@kernel.org>

Rob Herring <robh@kernel.org> writes:
> Replace open coded parsing of CPU nodes' 'reg' property with
> of_get_cpu_hwid().
>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: linuxppc-dev@lists.ozlabs.org
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
>  arch/powerpc/kernel/smp.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
> index 9cc7d3dbf439..d96b0e361a73 100644
> --- a/arch/powerpc/kernel/smp.c
> +++ b/arch/powerpc/kernel/smp.c
> @@ -1313,18 +1313,13 @@ int __cpu_up(unsigned int cpu, struct task_struct *tidle)
>  int cpu_to_core_id(int cpu)
>  {
>  	struct device_node *np;
> -	const __be32 *reg;
>  	int id = -1;
>  
>  	np = of_get_cpu_node(cpu, NULL);
>  	if (!np)
>  		goto out;
>  
> -	reg = of_get_property(np, "reg", NULL);
> -	if (!reg)
> -		goto out;
> -
> -	id = be32_to_cpup(reg);
> +	id = of_get_cpu_hwid(np, 0);
>  out:
>  	of_node_put(np);
>  	return id;

This looks OK to me.

All the systems I can find have a /cpus/#address-cells of 1, so the
change to use of_n_addr_cells() in of_get_cpu_hwid() should be fine.

I booted it on a bunch of systems with no issues.

Acked-by: Michael Ellerman <mpe@ellerman.id.au>

cheers

  reply	other threads:[~2021-10-08 11:01 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-06 16:43 [PATCH 00/12] DT: CPU h/w id parsing clean-ups and cacheinfo id support Rob Herring
2021-10-06 16:43 ` [PATCH 01/12] of: Add of_get_cpu_hwid() to read hardware ID from CPU nodes Rob Herring
2021-10-18 13:26   ` Sudeep Holla
2021-10-06 16:43 ` [PATCH 02/12] ARM: Use of_get_cpu_hwid() Rob Herring
2021-10-06 16:43 ` [PATCH 03/12] ARM: broadcom: " Rob Herring
2021-10-07  2:24   ` Florian Fainelli
2021-10-06 16:43 ` [PATCH 04/12] arm64: " Rob Herring
2021-10-07  8:07   ` Will Deacon
2021-10-18 13:27   ` Sudeep Holla
2021-10-06 16:43 ` [PATCH 05/12] csky: " Rob Herring
2021-10-06 16:43 ` [PATCH 06/12] openrisc: " Rob Herring
2021-10-06 20:44   ` Stafford Horne
2021-10-06 21:08     ` Rob Herring
2021-10-06 21:25       ` Stafford Horne
2021-10-06 21:27     ` Segher Boessenkool
2021-10-06 22:37       ` Stafford Horne
2021-10-07  7:53       ` David Laight
2021-10-06 16:43 ` [PATCH 07/12] powerpc: " Rob Herring
2021-10-08 11:01   ` Michael Ellerman [this message]
2021-10-06 16:43 ` [PATCH 08/12] riscv: " Rob Herring
2021-10-06 16:43 ` [PATCH 09/12] sh: " Rob Herring
2021-10-27 14:26   ` Rich Felker
2021-10-06 16:43 ` [PATCH 10/12] x86: dt: " Rob Herring
2021-10-06 16:43 ` [PATCH 11/12] cacheinfo: Allow for >32-bit cache 'id' Rob Herring
2021-10-18 13:30   ` Sudeep Holla
2021-10-06 16:43 ` [PATCH 12/12] cacheinfo: Set cache 'id' based on DT data Rob Herring
2021-10-18 13:31   ` Sudeep Holla
2021-10-07  2:24 ` [PATCH 00/12] DT: CPU h/w id parsing clean-ups and cacheinfo id support Florian Fainelli
2021-10-20 18:47 ` Rob Herring

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