Hi Michael, [auto build test ERROR on powerpc/next] [also build test ERROR on v4.13-rc6 next-20170823] [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-numa-Update-CPU-topology-when-VPHN-enabled/20170823-173526 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-defconfig (attached as .config) compiler: powerpc64-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 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All errors (new ones prefixed by >>): arch/powerpc/mm/numa.c: In function 'initmem_init': >> arch/powerpc/mm/numa.c:923:3: error: 'levelval' may be used uninitialized in >> this function [-Werror=maybe-uninitialized] printk(KERN_INFO "Numa nodes avail: %d (%d) \n", (int) levelval, (int) entries); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/mm/numa.c:904:21: note: 'levelval' was declared here u32 len, entries, levelval, i; ^~~~~~~~ cc1: all warnings being treated as errors vim +/levelval +923 arch/powerpc/mm/numa.c 895 896 static void __init node_associativity_setup(void) 897 { 898 struct device_node *rtas; 899 printk(KERN_INFO "%s:%d\n", __FUNCTION__, __LINE__); 900 901 rtas = of_find_node_by_path("/rtas"); 902 if (rtas) { 903 const __be32 *prop; 904 u32 len, entries, levelval, i; 905 printk(KERN_INFO "%s:%d\n", __FUNCTION__, __LINE__); 906 907 prop = of_get_property(rtas, "ibm,max-associativity-domains", &len); 908 if (!prop || len < sizeof(unsigned int)) { 909 printk(KERN_INFO "%s:%d\n", __FUNCTION__, __LINE__); 910 goto endit; 911 } 912 913 entries = of_read_number(prop++, 1); 914 915 if (len < (entries * sizeof(unsigned int))) { 916 printk(KERN_INFO "%s:%d\n", __FUNCTION__, __LINE__); 917 goto endit; 918 } 919 920 for (i = 0; i < entries; i++) 921 levelval = of_read_number(prop++, 1); 922 > 923 printk(KERN_INFO "Numa nodes avail: %d (%d) \n", (int) > levelval, (int) entries); 924 925 for (i = 0; i < levelval; i++) { 926 if (!node_possible(i)) { 927 setup_node_data(i, 0, 0); 928 node_set(i, node_possible_map); 929 } 930 } 931 } 932 933 endit: 934 if (rtas) 935 of_node_put(rtas); 936 } 937 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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