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R. Silva" Cc: oe-kbuild-all@lists.linux.dev, "Gustavo A. R. Silva" , LKML Subject: [gustavoars:testing/wfamnae-next20250124 1/15] kernel/sched/ext.c:3872:24: error: returning 'struct cgroup_hdr *' from a function with incompatible return type 'struct cgroup *' Message-ID: <202501271831.aVHIfaqV-lkp@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline tree: https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/wfamnae-next20250124 head: 54447c8c7cc239e559f3b58a7a70d9b776ed9b03 commit: 3cbd577a7864cca3fe87e22054d95e2238b6592b [1/15] cgroup: Avoid -Wflex-array-member-not-at-end warnings config: arm-randconfig-002-20250127 (https://download.01.org/0day-ci/archive/20250127/202501271831.aVHIfaqV-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250127/202501271831.aVHIfaqV-lkp@intel.com/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 | Closes: https://lore.kernel.org/oe-kbuild-all/202501271831.aVHIfaqV-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from kernel/sched/build_policy.c:63: kernel/sched/ext.c: In function 'tg_cgrp': >> kernel/sched/ext.c:3872:24: error: returning 'struct cgroup_hdr *' from a function with incompatible return type 'struct cgroup *' [-Wincompatible-pointer-types] 3872 | return &cgrp_dfl_root.cgrp; | ^~~~~~~~~~~~~~~~~~~ kernel/sched/ext.c: In function 'scx_bpf_task_cgroup': >> kernel/sched/ext.c:7648:31: error: initialization of 'struct cgroup *' from incompatible pointer type 'struct cgroup_hdr *' [-Wincompatible-pointer-types] 7648 | struct cgroup *cgrp = &cgrp_dfl_root.cgrp; | ^ In file included from kernel/sched/build_policy.c:52: kernel/sched/rt.c: At top level: kernel/sched/rt.c:9:18: warning: 'max_rt_runtime' defined but not used [-Wunused-const-variable=] 9 | static const u64 max_rt_runtime = MAX_BW; | ^~~~~~~~~~~~~~ vim +3872 kernel/sched/ext.c f0e1a0643a59bf Tejun Heo 2024-06-18 3860 8195136669661f Tejun Heo 2024-09-04 3861 #ifdef CONFIG_EXT_GROUP_SCHED 8195136669661f Tejun Heo 2024-09-04 3862 static struct cgroup *tg_cgrp(struct task_group *tg) 8195136669661f Tejun Heo 2024-09-04 3863 { 8195136669661f Tejun Heo 2024-09-04 3864 /* 8195136669661f Tejun Heo 2024-09-04 3865 * If CGROUP_SCHED is disabled, @tg is NULL. If @tg is an autogroup, 8195136669661f Tejun Heo 2024-09-04 3866 * @tg->css.cgroup is NULL. In both cases, @tg can be treated as the 8195136669661f Tejun Heo 2024-09-04 3867 * root cgroup. 8195136669661f Tejun Heo 2024-09-04 3868 */ 8195136669661f Tejun Heo 2024-09-04 3869 if (tg && tg->css.cgroup) 8195136669661f Tejun Heo 2024-09-04 3870 return tg->css.cgroup; 8195136669661f Tejun Heo 2024-09-04 3871 else 8195136669661f Tejun Heo 2024-09-04 @3872 return &cgrp_dfl_root.cgrp; 8195136669661f Tejun Heo 2024-09-04 3873 } 8195136669661f Tejun Heo 2024-09-04 3874 :::::: The code at line 3872 was first introduced by commit :::::: 8195136669661fdfe54e9a8923c33b31c92fc1da sched_ext: Add cgroup support :::::: TO: Tejun Heo :::::: CC: Tejun Heo -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki