Re: [PATCH] cpuidle: cpu hotplug support

From: kbuild test robot
Date: Sun Oct 13 2019 - 13:49:19 EST

Hi Zhenzhong,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on pm/linux-next]
[cannot apply to v5.4-rc2 next-20191011]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see]

base: linux-next
config: mips-allmodconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 7.4.0
wget -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.4.0 make.cross ARCH=mips

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

drivers/cpuidle/cpuidle.c: In function 'cpuidle_cpu_online':
>> drivers/cpuidle/cpuidle.c:580:6: error: 'coupled_cpus' undeclared (first use in this function); did you mean 'total_cpus'?
if (coupled_cpus)
drivers/cpuidle/cpuidle.c:580:6: note: each undeclared identifier is reported only once for each function it appears in

vim +580 drivers/cpuidle/cpuidle.c

561 static int cpuidle_cpu_online(unsigned int cpu)
562 {
563 int ret;
564 struct cpuidle_device *device;
565 struct cpuidle_driver *drv;
567 device = &per_cpu(cpuidle_dev, cpu);
568 device->cpu = cpu;
570 drv = cpuidle_get_cpu_driver(device);
571 if (!drv || !cpumask_test_cpu(cpu, drv->cpumask))
572 return 0;
575 /*
576 * On multiplatform for ARM, the coupled idle states could be
577 * enabled in the kernel even if the cpuidle driver does not
578 * use it. Note, coupled_cpus is a struct copy.
579 */
> 580 if (coupled_cpus)
581 device->coupled_cpus = *coupled_cpus;
582 #endif
583 ret = cpuidle_register_device(device);
584 if (ret)
585 pr_err("Failed to register cpuidle device for cpu%d\n", cpu);
587 return ret;
588 }

0-DAY kernel test infrastructure Open Source Technology Center Intel Corporation

Attachment: .config.gz
Description: application/gzip