* kernel/cpu.c:1305:2: error: implicit declaration of function 'cpu_up_down_serialize_trainwrecks'
@ 2021-03-29 0:07 kernel test robot
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From: kernel test robot @ 2021-03-29 0:07 UTC (permalink / raw)
To: kbuild-all
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tree: https://github.com/0day-ci/linux/commits/UPDATE-20210328-050509/Alexey-Klimov/cpu-hotplug-wait-for-cpuset_hotplug_work-to-finish-on-cpu-onlining/20210317-084056
head: 4e665674caba94bc825338d96c58ba0b87317daf
commit: 4e665674caba94bc825338d96c58ba0b87317daf cpu/hotplug: wait for cpuset_hotplug_work to finish on cpu onlining
date: 27 hours ago
config: powerpc-chrp32_defconfig (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/4e665674caba94bc825338d96c58ba0b87317daf
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review UPDATE-20210328-050509/Alexey-Klimov/cpu-hotplug-wait-for-cpuset_hotplug_work-to-finish-on-cpu-onlining/20210317-084056
git checkout 4e665674caba94bc825338d96c58ba0b87317daf
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
kernel/cpu.c: In function '_cpu_up':
>> kernel/cpu.c:1305:2: error: implicit declaration of function 'cpu_up_down_serialize_trainwrecks' [-Werror=implicit-function-declaration]
1305 | cpu_up_down_serialize_trainwrecks(tasks_frozen);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/cpu_up_down_serialize_trainwrecks +1305 kernel/cpu.c
1247
1248 /* Requires cpu_add_remove_lock to be held */
1249 static int _cpu_up(unsigned int cpu, int tasks_frozen, enum cpuhp_state target)
1250 {
1251 struct cpuhp_cpu_state *st = per_cpu_ptr(&cpuhp_state, cpu);
1252 struct task_struct *idle;
1253 int ret = 0;
1254
1255 cpus_write_lock();
1256
1257 if (!cpu_present(cpu)) {
1258 ret = -EINVAL;
1259 goto out;
1260 }
1261
1262 /*
1263 * The caller of cpu_up() might have raced with another
1264 * caller. Nothing to do.
1265 */
1266 if (st->state >= target)
1267 goto out;
1268
1269 if (st->state == CPUHP_OFFLINE) {
1270 /* Let it fail before we try to bring the cpu up */
1271 idle = idle_thread_get(cpu);
1272 if (IS_ERR(idle)) {
1273 ret = PTR_ERR(idle);
1274 goto out;
1275 }
1276 }
1277
1278 cpuhp_tasks_frozen = tasks_frozen;
1279
1280 cpuhp_set_state(st, target);
1281 /*
1282 * If the current CPU state is in the range of the AP hotplug thread,
1283 * then we need to kick the thread once more.
1284 */
1285 if (st->state > CPUHP_BRINGUP_CPU) {
1286 ret = cpuhp_kick_ap_work(cpu);
1287 /*
1288 * The AP side has done the error rollback already. Just
1289 * return the error code..
1290 */
1291 if (ret)
1292 goto out;
1293 }
1294
1295 /*
1296 * Try to reach the target state. We max out on the BP at
1297 * CPUHP_BRINGUP_CPU. After that the AP hotplug thread is
1298 * responsible for bringing it up to the target state.
1299 */
1300 target = min((int)target, CPUHP_BRINGUP_CPU);
1301 ret = cpuhp_up_callbacks(cpu, st, target);
1302 out:
1303 cpus_write_unlock();
1304 arch_smt_update();
> 1305 cpu_up_down_serialize_trainwrecks(tasks_frozen);
1306 return ret;
1307 }
1308
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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2021-03-29 0:07 kernel/cpu.c:1305:2: error: implicit declaration of function 'cpu_up_down_serialize_trainwrecks' kernel test robot
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