linux-kernel - Re: [PATCH] irqchip/bcm2836: Move SMP startup code to arch/arm

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Message-ID: <5ea27eff-8495-63d1-abd1-eef283ea2b5d@arm.com>
Date:   Wed, 10 May 2017 16:38:20 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     Phil Elwell <phil@...pberrypi.org>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Eric Anholt <eric@...olt.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>
Subject: Re: [PATCH] irqchip/bcm2836: Move SMP startup code to arch/arm

On 10/05/17 16:32, Phil Elwell wrote:
> On 10/05/2017 16:31, Marc Zyngier wrote:
>> On 10/05/17 16:07, Phil Elwell wrote:
>>> On 10/05/2017 14:32, Marc Zyngier wrote:
>>>> On 10/05/17 14:26, Marc Zyngier wrote:
>>>>> One of the RPi-2/3 irqchip's key features is that it contains some
>>>>> SMP startup code for the 32bit ARM architecture version. The only
>>>>> reason I can imagine for this is "RPi is special".
>>>>>
>>>>> Let's move this code where it belongs (in the platform support code),
>>>>> creating a shared include file for this purpose.
>>>>>
>>>>> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
>>>>
>>>> Also:
>>>> Fixes: 41f4988cc287 ("irqchip/bcm2836: Add SMP support for the 2836")
>>>>
>>>> 	M.
>>>>
>>>
>>> The patch has some checkpatch warnings, but otherwise:
>>
>> Bah...
>>
>> WARNING: line over 80 characters
>> #51: FILE: arch/arm/mach-bcm/board_bcm2835.c:30:
>> +static int bcm2836_smp_boot_secondary(unsigned int cpu, struct task_struct *idle)
>>
>> WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
>> #194: 
>> new file mode 100644
>>
>> Yup, the checkpatch stamp of approval. My screen has stopped being 
>> limited to 80 chars at some point between 1989 and 1991. As for the
>> MAINTAINERS file, that's probably for the maintainers to pick it up.
>>
>>> Reviewed-by: Phil Elwell <phil@...pberrypi.org>
>>> Tested-by: Phil Elwell <phil@...pberrypi.org>
>>
>> Thanks. I assume you'll respin your DSB/SEV fix on top of this?
> 
> Yes - how does one manage the timing of interdependent patches?

You get the maintainers of this code to queue both patches at the same
time. You can take them directly through the BCM tree if that makes
things easier for you.

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...