linux-kernel - Re: Build error with !CONFIG_SMP in v4.2-rc1 on arm multi_v7

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Date:	Fri, 10 Jul 2015 14:39:33 -0600
From:	Lina Iyer <lina.iyer@...aro.org>
To:	Dave Gerlach <d-gerlach@...com>
Cc:	Stephen Boyd <sboyd@...eaurora.org>, linux-arm-msm@...r.kernel.org,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: Build error with !CONFIG_SMP in v4.2-rc1 on arm
 multi_v7_defconfig

On Fri, Jul 10 2015 at 14:29 -0600, Dave Gerlach wrote:
>On 07/10/2015 02:36 PM, Stephen Boyd wrote:
>> On 07/10/2015 12:31 PM, Dave Gerlach wrote:
>>> Hello,
>>> I am seeing the following error when building v4.2-rc1 for arm with
>>> multi_v7_defconfig with CONFIG_SMP=n:
>>>
>>>  LINK    vmlinux
>>>   LD      vmlinux.o
>>>   MODPOST vmlinux.o
>>>   GEN     .version
>>>   CHK     include/generated/compile.h
>>>   UPD     include/generated/compile.h
>>>   CC      init/version.o
>>>   LD      init/built-in.o
>>> drivers/built-in.o: In function `qcom_pm_collapse':
>>> :(.text+0xaf44c): undefined reference to `qcom_scm_cpu_power_down'
>>> drivers/built-in.o: In function `qcom_cpuidle_init':
>>> :(.init.text+0x9508): undefined reference to `qcom_scm_set_warm_boot_addr'
>>> make: *** [vmlinux] Error 1
>>>
>>>
>>> It appears the calling functions in drivers/soc/qcom/spm.c get included by
>>> CONFIG_QCOM_PM which is part of multi_v7_defconfig but the missing functions
>>> from drivers/firmware/qcom_scm.c only get included by CONFIG_QCOM_SCM if SMP is
>>> selected. I am not sure if the correct approach is to remove CONFIG_QCOM_PM from
>>> multi_v7_defconfig or to remove 'if SMP' from CONFIG_QCOM_SCM, or something else
>>> entirely. Thoughts?
>>>
>>>
>>
>> CONFIG_QCOM_PM should select CONFIG_QCOM_SCM unconditionally.
>>
>
>Ok thanks, I can send a quick patch.
>
I sent one a few minutes ago, in reply to your mail :)
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