Messages in this thread | | | Date | Thu, 12 Oct 2023 22:54:35 +0800 | From | kernel test robot <> | Subject | Re: [PATCH] kernel/workqueue: Re move unnecessary ‘0’ values from hash |
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Hi Li,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tj-wq/for-next] [also build test WARNING on linus/master v6.6-rc5 next-20231012] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Li-zeming/kernel-workqueue-Remove-unnecessary-0-values-from-hash/20230828-095048 base: https://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-next patch link: https://lore.kernel.org/r/20230829181755.3204-1-zeming%40nfschina.com patch subject: [PATCH] kernel/workqueue: Remove unnecessary ‘0’ values from hash config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20231012/202310122250.6u2Qc26r-lkp@intel.com/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231012/202310122250.6u2Qc26r-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202310122250.6u2Qc26r-lkp@intel.com/
All warnings (new ones prefixed by >>):
kernel/workqueue.c: In function 'wqattrs_hash': >> kernel/workqueue.c:3777:7: warning: 'hash' is used uninitialized in this function [-Wuninitialized] hash = jhash_1word(attrs->nice, hash); ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vim +/hash +3777 kernel/workqueue.c
5de7a03cac1476 Tejun Heo 2023-08-07 3771 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3772 /* hash value of the content of @attr */ 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3773 static u32 wqattrs_hash(const struct workqueue_attrs *attrs) 226223ab3c4118 Tejun Heo 2013-03-12 3774 { dd46423224bbdf Li zeming 2023-08-30 3775 u32 hash; 226223ab3c4118 Tejun Heo 2013-03-12 3776 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 @3777 hash = jhash_1word(attrs->nice, hash); 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3778 hash = jhash(cpumask_bits(attrs->cpumask), 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3779 BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long), hash); 9546b29e4a6ad6 Tejun Heo 2023-08-07 3780 hash = jhash(cpumask_bits(attrs->__pod_cpumask), 9546b29e4a6ad6 Tejun Heo 2023-08-07 3781 BITS_TO_LONGS(nr_cpumask_bits) * sizeof(long), hash); 8639ecebc9b179 Tejun Heo 2023-08-07 3782 hash = jhash_1word(attrs->affn_strict, hash); 6ba94429c8e7b8 Frederic Weisbecker 2015-04-02 3783 return hash; d55262c4d16475 Tejun Heo 2013-04-01 3784 } 226223ab3c4118 Tejun Heo 2013-03-12 3785
-- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
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