tree: https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-next head: e76d28bdf9ba5388b8c4835a5199dc427b603188 commit: fe28f631fa941fba583d1c4f25895284b90af671 [7/11] workqueue: Add workqueue_unbound_exclude_cpumask() to exclude CPUs from wq_unbound_cpumask config: i386-tinyconfig (https://download.01.org/0day-ci/archive/20231113/202311130831.uh0AoCd1-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231113/202311130831.uh0AoCd1-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202311130831.uh0AoCd1-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/workqueue.c:5848:12: warning: 'workqueue_set_unbound_cpumask' defined but not used [-Wunused-function] 5848 | static int workqueue_set_unbound_cpumask(cpumask_var_t cpumask) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/workqueue_set_unbound_cpumask +5848 kernel/workqueue.c 5835 5836 /** 5837 * workqueue_set_unbound_cpumask - Set the low-level unbound cpumask 5838 * @cpumask: the cpumask to set 5839 * 5840 * The low-level workqueues cpumask is a global cpumask that limits 5841 * the affinity of all unbound workqueues. This function check the @cpumask 5842 * and apply it to all unbound workqueues and updates all pwqs of them. 5843 * 5844 * Return: 0 - Success 5845 * -EINVAL - Invalid @cpumask 5846 * -ENOMEM - Failed to allocate memory for attrs or pwqs. 5847 */ > 5848 static int workqueue_set_unbound_cpumask(cpumask_var_t cpumask) 5849 { 5850 int ret = -EINVAL; 5851 5852 /* 5853 * Not excluding isolated cpus on purpose. 5854 * If the user wishes to include them, we allow that. 5855 */ 5856 cpumask_and(cpumask, cpumask, cpu_possible_mask); 5857 if (!cpumask_empty(cpumask)) { 5858 apply_wqattrs_lock(); 5859 cpumask_copy(wq_requested_unbound_cpumask, cpumask); 5860 if (cpumask_equal(cpumask, wq_unbound_cpumask)) { 5861 ret = 0; 5862 goto out_unlock; 5863 } 5864 5865 ret = workqueue_apply_unbound_cpumask(cpumask); 5866 5867 out_unlock: 5868 apply_wqattrs_unlock(); 5869 } 5870 5871 return ret; 5872 } 5873 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
