linux-kernel - Re: [PATCH v4 20/28] ARM: owl: Implement CPU enable-method for S500

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Date:   Wed, 21 Jun 2017 20:02:38 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Andreas Färber <afaerber@...e.de>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        mp-cs@...ions-semi.com, Thomas Liau <thomas.liau@...ions-semi.com>,
        张东风 <zhangdf@...ions-semi.com>,
        刘炜 <liuwei@...ions-semi.com>,
        张天益 <tyzhang@...ions-semi.com>,
        96boards@...obotics.com, support@...aker.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH v4 20/28] ARM: owl: Implement CPU enable-method for S500

On Wed, Jun 21, 2017 at 6:48 PM, Andreas Färber <afaerber@...e.de> wrote:
> Am 21.06.2017 um 12:25 schrieb Arnd Bergmann:
>> On Wed, Jun 21, 2017 at 10:16 AM, Arnd Bergmann <arnd@...db.de> wrote:
>>> On Tue, Jun 6, 2017 at 2:54 AM, Andreas Färber <afaerber@...e.de> wrote:
>>>> Allow to bring up CPU1.
>>>>
>>>> Based on LeMaker linux-actions tree.
>>>>
>>>> Signed-off-by: Andreas Färber <afaerber@...e.de>
>>>> ---
>>>>  v3 -> v4: Unchanged
>>>>
>>>>  v3: new
>>>>
>>>>  arch/arm/mach-actions/Makefile  |   3 +
>>>>  arch/arm/mach-actions/headsmp.S |  68 ++++++++++++++++
>>>>  arch/arm/mach-actions/platsmp.c | 166 ++++++++++++++++++++++++++++++++++++++++
>>>
>>> I now see build errors in linux-next:
>>>
>>> /git/arm-soc/arch/arm/mach-actions/platsmp.c: In function 'write_pen_release':
>>> /git/arm-soc/arch/arm/mach-actions/platsmp.c:39:2: error:
>>> 'pen_release' undeclared (first use in this function); did you mean
>>
>> I have a fix and tested it now. Please fold this into your patch:
>>
>>        Arnd
>>
>> Subject: [PATCH] ARM: owl: fix non-SMP build
>>
>> arch/arm/mach-actions/platsmp.c: In function 'write_pen_release':
>> arch/arm/mach-actions/platsmp.c:39:2: error: 'pen_release' undeclared
>> (first use in this function); did you mean 'seq_release'?
>>
>> Signed-off-by: Arnd Bergmann <arnd@...db.de>
>>
>> diff --git a/arch/arm/mach-actions/Makefile b/arch/arm/mach-actions/Makefile
>> index 217e95d04b43..94f8dbafba21 100644
>> --- a/arch/arm/mach-actions/Makefile
>> +++ b/arch/arm/mach-actions/Makefile
>> @@ -1,4 +1,4 @@
>> -obj-$(CONFIG_ARCH_ACTIONS) += owl.o
>> -obj-${CONFIG_ARCH_ACTIONS} += platsmp.o headsmp.o
>> +obj-y += owl.o
>> +obj-$(CONFIG_SMP) += platsmp.o headsmp.o
>
> Sorry. Fixed up the two patches, thanks!
>
> Interestingly the below issue had been found by automatic patch testing,
> but the above wasn't. Maybe you can contribute your non-SMP config for
> the bots, to help catch this earlier?

This was just a randconfig build. On ARM32, we do test
"multi_v7_defconfig+CONFIG_SMP=n"
in kernelci, but that only tests mach-actions after that gets added to
multi_v7_defconfig. Not sure if it's worth adding an allmodconfig+CONFIG_SMP=n"
build, the allmodconfig builds are rather expensive.

        Arnd