Hi Daniel, [auto build test WARNING on pci/next] [also build test WARNING on v4.4-rc6 next-20151223] url: https://github.com/0day-ci/linux/commits/Daniel-J-Blueman/PCI-Add-mechanism-to-find-topologically-near-cores/20151223-181947 base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next config: s390-allyesconfig (attached as .config) reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=s390 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. All warnings (new ones prefixed by >>): In file included from include/linux/smp.h:12:0, from arch/s390/include/asm/spinlock.h:12, from include/linux/spinlock.h:87, from include/linux/rcupdate.h:38, from include/linux/idr.h:18, 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 drivers/pci/pci.c:13: drivers/pci/pci.c: In function 'cpu_near_dev': >> include/linux/cpumask.h:174:9: warning: array subscript is below array bounds [-Warray-bounds] return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits); ^ vim +174 include/linux/cpumask.h da91309e Amir Vadai 2014-06-09 158 2d3854a3 Rusty Russell 2008-11-05 159 #define for_each_cpu(cpu, mask) \ 2d3854a3 Rusty Russell 2008-11-05 160 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask) 8bd93a2c Paul E. McKenney 2010-02-22 161 #define for_each_cpu_not(cpu, mask) \ 8bd93a2c Paul E. McKenney 2010-02-22 162 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask) 2d3854a3 Rusty Russell 2008-11-05 163 #define for_each_cpu_and(cpu, mask, and) \ 2d3854a3 Rusty Russell 2008-11-05 164 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask, (void)and) 2d3854a3 Rusty Russell 2008-11-05 165 #else 2d3854a3 Rusty Russell 2008-11-05 166 /** 2d3854a3 Rusty Russell 2008-11-05 167 * cpumask_first - get the first cpu in a cpumask 2d3854a3 Rusty Russell 2008-11-05 168 * @srcp: the cpumask pointer 2d3854a3 Rusty Russell 2008-11-05 169 * 2d3854a3 Rusty Russell 2008-11-05 170 * Returns >= nr_cpu_ids if no cpus set. 2d3854a3 Rusty Russell 2008-11-05 171 */ 2d3854a3 Rusty Russell 2008-11-05 172 static inline unsigned int cpumask_first(const struct cpumask *srcp) 2d3854a3 Rusty Russell 2008-11-05 173 { 2d3854a3 Rusty Russell 2008-11-05 @174 return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits); 2d3854a3 Rusty Russell 2008-11-05 175 } 2d3854a3 Rusty Russell 2008-11-05 176 2d3854a3 Rusty Russell 2008-11-05 177 /** 2d3854a3 Rusty Russell 2008-11-05 178 * cpumask_next - get the next cpu in a cpumask 2d3854a3 Rusty Russell 2008-11-05 179 * @n: the cpu prior to the place to search (ie. return will be > @n) 2d3854a3 Rusty Russell 2008-11-05 180 * @srcp: the cpumask pointer 2d3854a3 Rusty Russell 2008-11-05 181 * 2d3854a3 Rusty Russell 2008-11-05 182 * Returns >= nr_cpu_ids if no further cpus set. :::::: The code at line 174 was first introduced by commit :::::: 2d3854a37e8b767a51aba38ed6d22817b0631e33 cpumask: introduce new API, without changing anything :::::: TO: Rusty Russell <rusty@xxxxxxxxxxxxxxx> :::::: CC: Ingo Molnar <mingo@xxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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