Hi Tejun, kernel test robot noticed the following build warnings: [auto build test WARNING on next-20230831] [cannot apply to linus/master v6.5 v6.5-rc7 v6.5-rc6 v6.5] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Tejun-Heo/cgroup-Put-cgroup_local_stat_show-inside-CONFIG_CGROUP_SCHED/20230902-234358 base: next-20230831 patch link: https://lore.kernel.org/r/ZPNX-jZAZbebizXA%40slm.duckdns.org patch subject: [PATCH cgroup/for-6.6-fixes] cgroup: Put cgroup_local_stat_show() inside CONFIG_CGROUP_SCHED config: arm-defconfig (https://download.01.org/0day-ci/archive/20230903/202309030303.qSTfRgZC-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230903/202309030303.qSTfRgZC-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/202309030303.qSTfRgZC-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/cgroup/cgroup.c:503:36: warning: 'cgroup_tryget_css' defined but not used [-Wunused-function] 503 | static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp, | ^~~~~~~~~~~~~~~~~ vim +/cgroup_tryget_css +503 kernel/cgroup/cgroup.c 42809dd4225b2f kernel/cgroup.c Tejun Heo 2012-11-19 494 d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 495 /** d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 496 * cgroup_tryget_css - try to get a cgroup's css for the specified subsystem d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 497 * @cgrp: the cgroup of interest d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 498 * @ss: the subsystem of interest d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 499 * 08b2b6fdf6b260 kernel/cgroup/cgroup.c Zhen Lei 2021-05-24 500 * Find and get @cgrp's css associated with @ss. If the css doesn't exist d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 501 * or is offline, %NULL is returned. d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 502 */ d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 @503 static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp, d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 504 struct cgroup_subsys *ss) d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 505 { d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 506 struct cgroup_subsys_state *css; d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 507 d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 508 rcu_read_lock(); d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 509 css = cgroup_css(cgrp, ss); a581563f1bef03 kernel/cgroup/cgroup.c Peng Wang 2019-07-03 510 if (css && !css_tryget_online(css)) d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 511 css = NULL; d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 512 rcu_read_unlock(); d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 513 d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 514 return css; d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 515 } d41bf8c9deaed1 kernel/cgroup/cgroup.c Tejun Heo 2017-10-23 516 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
