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SubjectRe: [rcu:dev.2020.02.12a 109/124] kernel/torture.c:239:3: error: implicit declaration of function 'rcutorture_sched_setaffinity'; did you mean '__NR_ia32_sched_setaffinity'?
On Sat, Feb 15, 2020 at 03:55:27PM +0800, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2020.02.12a
> head: 35a305226917a71de1c060db96fed0520cf644d9
> commit: bc3db9afb8492662a1108616342f288de66baa8f [109/124] EXP: rcutorture hack to force CPU hotplug onto CPU 0
> config: x86_64-randconfig-s0-20200215 (attached as .config)
> compiler: gcc-7 (Debian 7.5.0-4) 7.5.0
> reproduce:
> git checkout bc3db9afb8492662a1108616342f288de66baa8f
> # save the attached .config to linux build tree
> make ARCH=x86_64
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
> kernel/torture.c: In function 'torture_onoff':
> >> kernel/torture.c:239:3: error: implicit declaration of function 'rcutorture_sched_setaffinity'; did you mean '__NR_ia32_sched_setaffinity'? [-Werror=implicit-function-declaration]
> rcutorture_sched_setaffinity(current->pid, cpumask_of(0));
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
> __NR_ia32_sched_setaffinity
> cc1: some warnings being treated as errors

And this experimental commit is now gone from current -rcu, though you
might well have a few more branches containing it in your queue.

Thanx, Paul

> vim +239 kernel/torture.c
>
> 195
> 196 /*
> 197 * Execute random CPU-hotplug operations at the interval specified
> 198 * by the onoff_interval.
> 199 */
> 200 static int
> 201 torture_onoff(void *arg)
> 202 {
> 203 int cpu;
> 204 int maxcpu = -1;
> 205 DEFINE_TORTURE_RANDOM(rand);
> 206 int ret;
> 207
> 208 VERBOSE_TOROUT_STRING("torture_onoff task started");
> 209 for_each_online_cpu(cpu)
> 210 maxcpu = cpu;
> 211 WARN_ON(maxcpu < 0);
> 212 if (!IS_MODULE(CONFIG_TORTURE_TEST))
> 213 for_each_possible_cpu(cpu) {
> 214 if (cpu_online(cpu))
> 215 continue;
> 216 ret = cpu_up(cpu);
> 217 if (ret && verbose) {
> 218 pr_alert("%s" TORTURE_FLAG
> 219 "%s: Initial online %d: errno %d\n",
> 220 __func__, torture_type, cpu, ret);
> 221 }
> 222 }
> 223
> 224 if (maxcpu == 0) {
> 225 VERBOSE_TOROUT_STRING("Only one CPU, so CPU-hotplug testing is disabled");
> 226 goto stop;
> 227 }
> 228
> 229 if (onoff_holdoff > 0) {
> 230 VERBOSE_TOROUT_STRING("torture_onoff begin holdoff");
> 231 schedule_timeout_interruptible(onoff_holdoff);
> 232 VERBOSE_TOROUT_STRING("torture_onoff end holdoff");
> 233 }
> 234 while (!torture_must_stop()) {
> 235 if (disable_onoff_at_boot && !rcu_inkernel_boot_has_ended()) {
> 236 schedule_timeout_interruptible(HZ / 10);
> 237 continue;
> 238 }
> > 239 rcutorture_sched_setaffinity(current->pid, cpumask_of(0));
> 240 cpu = (torture_random(&rand) >> 4) % (maxcpu + 1);
> 241 if (!torture_offline(cpu,
> 242 &n_offline_attempts, &n_offline_successes,
> 243 &sum_offline, &min_offline, &max_offline))
> 244 torture_online(cpu,
> 245 &n_online_attempts, &n_online_successes,
> 246 &sum_online, &min_online, &max_online);
> 247 schedule_timeout_interruptible(onoff_interval);
> 248 }
> 249
> 250 stop:
> 251 torture_kthread_stopping("torture_onoff");
> 252 return 0;
> 253 }
> 254
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org


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