Hi Daniel, kernel test robot noticed the following build errors: [auto build test ERROR on 32f85e8468ce081d8e73ca3f0d588f1004013037] url: https://github.com/intel-lab-lkp/linux/commits/Daniel-Wagner/lib-group_cpus-Add-group_masks_cpus_evenly/20250703-003811 base: 32f85e8468ce081d8e73ca3f0d588f1004013037 patch link: https://lore.kernel.org/r/20250702-isolcpus-io-queues-v7-8-557aa7eacce4%40kernel.org patch subject: [PATCH v7 08/10] blk-mq: use hk cpus only when isolcpus=io_queue is enabled config: arm-allnoconfig (https://download.01.org/0day-ci/archive/20250703/202507032238.AoTmQnGP-lkp@xxxxxxxxx/config) compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f1a4bb62452d88a0edd9340b3ca7c9b11ad9193f) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250703/202507032238.AoTmQnGP-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/202507032238.AoTmQnGP-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> block/blk-mq-cpumap.c:155:16: error: array initializer must be an initializer list 155 | cpumask_var_t active_hctx __free(free_cpumask_var) = NULL; | ^ block/blk-mq-cpumap.c:219:16: error: array initializer must be an initializer list 219 | cpumask_var_t active_hctx __free(free_cpumask_var) = NULL; | ^ block/blk-mq-cpumap.c:220:16: error: array initializer must be an initializer list 220 | cpumask_var_t mask __free(free_cpumask_var) = NULL; | ^ 3 errors generated. vim +155 block/blk-mq-cpumap.c 144 145 /* 146 * blk_mq_map_hk_queues - Create housekeeping CPU to 147 * hardware queue mapping 148 * @qmap: CPU to hardware queue map 149 * 150 * Create a housekeeping CPU to hardware queue mapping in @qmap. @qmap 151 * contains a valid configuration honoring the isolcpus configuration. 152 */ 153 static void blk_mq_map_hk_queues(struct blk_mq_queue_map *qmap) 154 { > 155 cpumask_var_t active_hctx __free(free_cpumask_var) = NULL; 156 struct cpumask *hk_masks __free(kfree) = NULL; 157 const struct cpumask *mask; 158 unsigned int queue, cpu, nr_masks; 159 160 if (housekeeping_enabled(HK_TYPE_IO_QUEUE)) 161 mask = housekeeping_cpumask(HK_TYPE_IO_QUEUE); 162 else 163 goto fallback; 164 165 if (!zalloc_cpumask_var(&active_hctx, GFP_KERNEL)) 166 goto fallback; 167 168 /* Map housekeeping CPUs to a hctx */ 169 hk_masks = group_mask_cpus_evenly(qmap->nr_queues, mask, &nr_masks); 170 if (!hk_masks) 171 goto fallback; 172 173 for (queue = 0; queue < qmap->nr_queues; queue++) { 174 unsigned int idx = (qmap->queue_offset + queue) % nr_masks; 175 176 for_each_cpu(cpu, &hk_masks[idx]) { 177 qmap->mq_map[cpu] = idx; 178 179 if (cpu_online(cpu)) 180 cpumask_set_cpu(qmap->mq_map[cpu], active_hctx); 181 } 182 } 183 184 /* Map isolcpus to hardware context */ 185 queue = cpumask_first(active_hctx); 186 for_each_cpu_andnot(cpu, cpu_possible_mask, mask) { 187 qmap->mq_map[cpu] = (qmap->queue_offset + queue) % nr_masks; 188 queue = cpumask_next_wrap(queue, active_hctx); 189 } 190 191 if (!blk_mq_hk_validate(qmap, active_hctx)) 192 goto fallback; 193 194 return; 195 196 fallback: 197 /* 198 * Map all CPUs to the first hctx to ensure at least one online 199 * housekeeping CPU is serving it. 200 */ 201 for_each_possible_cpu(cpu) 202 qmap->mq_map[cpu] = 0; 203 } 204 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
