Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <b39bf8c4-c702-8f49-12aa-d3ac05889b80@huawei.com>
Date:   Thu, 28 Jul 2022 09:06:55 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
 Thunderbird/91.6.1
Subject: Re: [PATCH 0/2] arm64 defconfig: Get faddr2line working
To:     Arnd Bergmann <arnd@arndb.de>
CC:     Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Olof Johansson <olof@lixom.net>, SoC Team <soc@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
References: <1658681004-132191-1-git-send-email-john.garry@huawei.com>
 <CAK8P3a0umWWic6LAzxXJ7BACYVE--m-wbynh7Z8F+pGoUBxGTA@mail.gmail.com>
 <25237c44-ebc4-fc9a-7c6f-3e990f968038@huawei.com>
 <CAK8P3a2+0EwSJ=fRBL2JCGypJRL-qE4rEiXYnJbqhZ=weethdQ@mail.gmail.com>
From:   John Garry <john.garry@huawei.com>
In-Reply-To: <CAK8P3a2+0EwSJ=fRBL2JCGypJRL-qE4rEiXYnJbqhZ=weethdQ@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

trim list

On 25/07/2022 13:51, Arnd Bergmann wrote:
>>> CONFIG_SLIMBUS=m
>> Config 5bd773242f75 added a kconfig "imply" on config SLIMBUS from
>> config SOUNDWIRE_QCOM, and this happens to mean that we don't explicitly
>> require config SLIMBUS enabled in the defconfig.
> That 'imply' looks like it was added to solve a problem using the old 'imply'
> semantics that are not what this keyword does today. I suspect it's still
> broken when CONFIG=SOUNDWIRE_QCOM=y and CONFIG_SLIBMUS=m,
> and the correct fix is to use a dependency like
> 
>        depends on SLIMBUS || !SLIMBUS
> 
> so the defconfig symbol should stay.
> 

JFYI, building for CONFIG_SOUNDWIRE_QCOM=y and CONFIG_SLIBMUS=m is ok. 
The driver has a runtime check for CONFIG_SLIMBUS in qcom_swrm_probe().

That implementation seems consistent with guidance in 
kconfig-language.rst - so do you think that there is still a problem?

thanks,
John