linux-kernel - Re: [PATCH v8 3/3] powerpc/sysfs: Add topology/smallcore_thread_siblings[

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Date:   Fri, 21 Sep 2018 14:20:15 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Neuling <mikey@...ling.org>,
        Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
        Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>,
        Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>,
        Oliver O'Halloran <oohall@...il.com>,
        Nicholas Piggin <npiggin@...il.com>,
        Murilo Opsfelder Araujo <muriloo@...ux.ibm.com>,
        Anton Blanchard <anton@...ba.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
Subject: Re: [PATCH v8 3/3] powerpc/sysfs: Add
 topology/smallcore_thread_siblings[_list]

Hi Gautham,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.19-rc4 next-20180919]
[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/Gautham-R-Shenoy/powerpc-Detection-and-scheduler-optimization-for-POWER9-bigcore/20180921-085812
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-mpc837x_mds_defconfig (attached as .config)
compiler: powerpc-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/kernel/sysfs.c: In function 'smallcore_thread_siblings_show':
>> arch/powerpc/kernel/sysfs.c:724:45: error: implicit declaration of function 'cpu_smallcore_mask'; did you mean 'cpu_all_mask'? [-Werror=implicit-function-declaration]
     return cpumap_print_to_pagebuf(false, buf, cpu_smallcore_mask(cpu));
                                                ^~~~~~~~~~~~~~~~~~
                                                cpu_all_mask
>> arch/powerpc/kernel/sysfs.c:724:45: error: passing argument 3 of 'cpumap_print_to_pagebuf' makes pointer from integer without a cast [-Werror=int-conversion]
   In file included from include/linux/rcupdate.h:44:0,
                    from include/linux/radix-tree.h:28,
                    from include/linux/idr.h:15,
                    from include/linux/kernfs.h:14,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/device.h:16,
                    from arch/powerpc/kernel/sysfs.c:1:
   include/linux/cpumask.h:892:1: note: expected 'const struct cpumask *' but argument is of type 'int'
    cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask)
    ^~~~~~~~~~~~~~~~~~~~~~~
   arch/powerpc/kernel/sysfs.c: In function 'smallcore_thread_siblings_list_show':
   arch/powerpc/kernel/sysfs.c:734:44: error: passing argument 3 of 'cpumap_print_to_pagebuf' makes pointer from integer without a cast [-Werror=int-conversion]
     return cpumap_print_to_pagebuf(true, buf, cpu_smallcore_mask(cpu));
                                               ^~~~~~~~~~~~~~~~~~
   In file included from include/linux/rcupdate.h:44:0,
                    from include/linux/radix-tree.h:28,
                    from include/linux/idr.h:15,
                    from include/linux/kernfs.h:14,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/device.h:16,
                    from arch/powerpc/kernel/sysfs.c:1:
   include/linux/cpumask.h:892:1: note: expected 'const struct cpumask *' but argument is of type 'int'
    cpumap_print_to_pagebuf(bool list, char *buf, const struct cpumask *mask)
    ^~~~~~~~~~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +724 arch/powerpc/kernel/sysfs.c

   717	
   718	static ssize_t smallcore_thread_siblings_show(struct device *dev,
   719						struct device_attribute *attr,
   720						char *buf)
   721	{
   722		int cpu = dev->id;
   723	
 > 724		return cpumap_print_to_pagebuf(false, buf, cpu_smallcore_mask(cpu));
   725	}
   726	static DEVICE_ATTR_RO(smallcore_thread_siblings);
   727	

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