Hi Huang, [auto build test WARNING on hwmon/hwmon-next -- if it's inappropriate base, please suggest rules for selecting the more suitable base]
url: https://github.com/0day-ci/linux/commits/Huang-Rui/hwmon-fam15h_power-Introduce-an-accumulated-power-reporting-algorithm/20151030-181426 config: x86_64-randconfig-x012-10300134 (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=x86_64 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 warnings (new ones prefixed by >>): In file included from arch/x86/include/asm/cpumask.h:4:0, from arch/x86/include/asm/msr.h:10, from arch/x86/include/asm/processor.h:20, from arch/x86/include/asm/atomic.h:6, from include/linux/atomic.h:4, from include/linux/debug_locks.h:5, from include/linux/lockdep.h:23, from include/linux/spinlock_types.h:18, from include/linux/mutex.h:15, from include/linux/kernfs.h:13, from include/linux/sysfs.h:15, from include/linux/kobject.h:21, from include/linux/device.h:17, from include/linux/hwmon-sysfs.h:23, from drivers/hwmon/fam15h_power.c:23: drivers/hwmon/fam15h_power.c: In function 'fam15h_power_probe': >> include/linux/cpumask.h:24:29: warning: 'res_mask' may be used uninitialized >> in this function [-Wmaybe-uninitialized] #define cpumask_bits(maskp) ((maskp)->bits) ^ drivers/hwmon/fam15h_power.c:145:32: note: 'res_mask' was declared here cpumask_var_t mask, tmp_mask, res_mask; ^ vim +/res_mask +24 include/linux/cpumask.h ^1da177e Linus Torvalds 2005-04-16 8 */ ^1da177e Linus Torvalds 2005-04-16 9 #include <linux/kernel.h> ^1da177e Linus Torvalds 2005-04-16 10 #include <linux/threads.h> ^1da177e Linus Torvalds 2005-04-16 11 #include <linux/bitmap.h> 187f1882 Paul Gortmaker 2011-11-23 12 #include <linux/bug.h> ^1da177e Linus Torvalds 2005-04-16 13 cdfdef75 Rusty Russell 2015-03-05 14 /* Don't assign or return these: may not be this big! */ 2d3854a3 Rusty Russell 2008-11-05 15 typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t; ^1da177e Linus Torvalds 2005-04-16 16 ae7a47e7 Rusty Russell 2008-12-30 17 /** 6ba2ef7b Rusty Russell 2009-09-24 18 * cpumask_bits - get the bits in a cpumask 6ba2ef7b Rusty Russell 2009-09-24 19 * @maskp: the struct cpumask * ae7a47e7 Rusty Russell 2008-12-30 20 * 6ba2ef7b Rusty Russell 2009-09-24 21 * You should only assume nr_cpu_ids bits of this mask are valid. This is 6ba2ef7b Rusty Russell 2009-09-24 22 * a macro so it's const-correct. ae7a47e7 Rusty Russell 2008-12-30 23 */ 6ba2ef7b Rusty Russell 2009-09-24 @24 #define cpumask_bits(maskp) ((maskp)->bits) 7ea931c9 Paul Jackson 2008-04-28 25 f1bbc032 Tejun Heo 2015-02-13 26 /** f1bbc032 Tejun Heo 2015-02-13 27 * cpumask_pr_args - printf args to output a cpumask f1bbc032 Tejun Heo 2015-02-13 28 * @maskp: cpumask to be printed f1bbc032 Tejun Heo 2015-02-13 29 * f1bbc032 Tejun Heo 2015-02-13 30 * Can be used to provide arguments for '%*pb[l]' when printing a cpumask. f1bbc032 Tejun Heo 2015-02-13 31 */ f1bbc032 Tejun Heo 2015-02-13 32 #define cpumask_pr_args(maskp) nr_cpu_ids, cpumask_bits(maskp) :::::: The code at line 24 was first introduced by commit :::::: 6ba2ef7baac23a5d9bb85e28b882d16b439a2293 cpumask: Move deprecated functions to end of header. :::::: TO: Rusty Russell <[email protected]> :::::: CC: Rusty Russell <[email protected]> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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