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[108.223.40.66]) by smtp.gmail.com with ESMTPSA id z20-v6sm13688269pfd.99.2018.07.19.06.49.02 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 19 Jul 2018 06:49:03 -0700 (PDT) Subject: Re: linux-next: build warning after merge of the net-next tree To: Stephen Rothwell Cc: David Miller , Networking , Linux-Next Mailing List , Linux Kernel Mailing List , Masahiro Yamada , Andrew Lunn References: <20180719120447.6e7ba23d@canb.auug.org.au> <20180719152940.0720e9c1@canb.auug.org.au> From: Guenter Roeck Message-ID: <6dabf12b-e3db-dfe8-101c-02772039e21a@roeck-us.net> Date: Thu, 19 Jul 2018 06:49:01 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180719152940.0720e9c1@canb.auug.org.au> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/18/2018 10:29 PM, Stephen Rothwell wrote: > Hi Guenter, > > On Wed, 18 Jul 2018 20:52:56 -0700 Guenter Roeck wrote: >> >> On 07/18/2018 07:04 PM, Stephen Rothwell wrote: >>> >>> After merging the net-next tree, today's linux-next build (x86_64 >>> allmodconfig) produced this warning: >>> >>> * >>> * Restart config... >>> * >>> .... >>> >>> This is output by my "make allmodconfig" and only started after merging >>> the net-next tree today. It has continued for further merges/builds. >>> >>> I suspect commit >>> >>> 1323061a018a ("net: phy: sfp: Add HWMON support for module sensors") >>> >>> which added an "imply" clause. >>> >> I thought "imply" was better than "depends on HWMON || HWMON=n", but maybe >> not. Is that a caveat when using "imply", and does it mean that "imply" >> should better not be used ? > > I don't know, sorry. It was just my best guess from what I could see > had changed. > > I wonder if it makes a difference that I am doing my "make > allmodconfig" on top of a previous "make allmodconfig" and some symbols > are marked as "NEW" (though they are not symbols related to the changes > that happened during the net-next tree merge)? > I tried to reproduce the problem, but I don't see the message. What I do see, though, is that "make allmodconfig" on a clean tree, followed by "make menuconfig", results in configuration changes. Specifically, > CONFIG_ARC_EMAC_CORE=m > CONFIG_ARC_EMAC=m > CONFIG_EMAC_ROCKCHIP=m is removed by menuconfig, and a large number of "# ... is not set" configuration lines are added. Weird and bad, since several of the disabled configurations _should_ be enabled by "make allmodconfig", and a large number of hwmon drivers are affected. Bisect does point to "net: phy: sfp: Add HWMON support for module sensors", meaning "imply hwmon" does have severe side effects and can not be used. I'll try to find a fix. Guenter