tree: https://kernel.googlesource.com/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge head: 79f0d67a241f0583b994c73437caa54a4e942737 commit: 73d2bcced00671c2b724a31c3a4b3401c3e278d0 [175/181] cpuidle: allow governor switch on cpuidle_register_driver() config: arm-defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 73d2bcced00671c2b724a31c3a4b3401c3e278d0 # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=arm If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/cpuidle/driver.c: In function 'cpuidle_register_driver': >> drivers/cpuidle/driver.c:270:4: error: 'cpuidle_prev_governor' undeclared (first use in this function); did you mean 'cpuidle_find_governor'? cpuidle_prev_governor = cpuidle_curr_governor; ^~~~~~~~~~~~~~~~~~~~~ cpuidle_find_governor drivers/cpuidle/driver.c:270:4: note: each undeclared identifier is reported only once for each function it appears in drivers/cpuidle/driver.c: In function 'cpuidle_unregister_driver': drivers/cpuidle/driver.c:301:6: error: 'cpuidle_prev_governor' undeclared (first use in this function); did you mean 'cpuidle_find_governor'? if (cpuidle_prev_governor) { ^~~~~~~~~~~~~~~~~~~~~ cpuidle_find_governor vim +270 drivers/cpuidle/driver.c 245 246 /** 247 * cpuidle_register_driver - registers a driver 248 * @drv: a pointer to a valid struct cpuidle_driver 249 * 250 * Register the driver under a lock to prevent concurrent attempts to 251 * [un]register the driver from occuring at the same time. 252 * 253 * Returns 0 on success, a negative error code (returned by 254 * __cpuidle_register_driver()) otherwise. 255 */ 256 int cpuidle_register_driver(struct cpuidle_driver *drv) 257 { 258 struct cpuidle_governor *gov; 259 int ret; 260 261 spin_lock(&cpuidle_driver_lock); 262 ret = __cpuidle_register_driver(drv); 263 spin_unlock(&cpuidle_driver_lock); 264 265 if (!ret && !strlen(param_governor) && drv->governor && 266 (cpuidle_get_driver() == drv)) { 267 mutex_lock(&cpuidle_lock); 268 gov = cpuidle_find_governor(drv->governor); 269 if (gov) { > 270 cpuidle_prev_governor = cpuidle_curr_governor; 271 if (cpuidle_switch_governor(gov) < 0) 272 cpuidle_prev_governor = NULL; 273 } 274 mutex_unlock(&cpuidle_lock); 275 } 276 277 return ret; 278 } 279 EXPORT_SYMBOL_GPL(cpuidle_register_driver); 280 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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