linux-kernel - Re: [PATCH V6 2/2] powerpc/numa: Update CPU topology when VPHN enabled

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Date:   Sun, 25 Jun 2017 08:04:05 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Michael Bringmann <mwb@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Reza Arbab <arbab@...ux.vnet.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Bharata B Rao <bharata@...ux.vnet.ibm.com>,
        Balbir Singh <bsingharora@...il.com>,
        Michael Bringmann <mwb@...ux.vnet.ibm.com>,
        Shailendra Singh <shailendras@...dia.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
        Andrew Donnellan <andrew.donnellan@....ibm.com>,
        John Allen <jallen@...ux.vnet.ibm.com>,
        Tyrel Datwyler <tyreld@...ux.vnet.ibm.com>,
        Sahil Mehta <sahilmehta17@...il.com>,
        Rashmica Gupta <rashmicy@...il.com>,
        Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH V6 2/2] powerpc/numa: Update CPU topology when VPHN
 enabled

Hi Michael,

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.12-rc6 next-20170623]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Michael-Bringmann/powerpc-hotplug-Ensure-enough-nodes-avail-for-operations/20170621-141803
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-storcenter_defconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   In file included from include/linux/topology.h:35:0,
                    from include/linux/gfp.h:8,
                    from include/linux/idr.h:16,
                    from include/linux/kernfs.h:14,
                    from include/linux/sysfs.h:15,
                    from include/linux/kobject.h:21,
                    from include/linux/of.h:21,
                    from include/linux/irqdomain.h:34,
                    from arch/powerpc/include/asm/irq.h:12,
                    from arch/powerpc/include/asm/prom.h:19,
                    from arch/powerpc/kernel/cputable.c:22:
>> arch/powerpc/include/asm/topology.h:85:12: error: 'timed_topology_update' defined but not used [-Werror=unused-function]
    static int timed_topology_update(int nsecs)
               ^~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +/timed_topology_update +85 arch/powerpc/include/asm/topology.h

    79	#endif /* CONFIG_NUMA && CONFIG_PPC_SPLPAR */
    80	
    81	#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) && \
    82		defined(CONFIG_HOTPLUG_CPU)
    83	extern int timed_topology_update(int nsecs);
    84	#else
  > 85	static int timed_topology_update(int nsecs)
    86	{
    87		return 0;
    88	}

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