Hi Yosry, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Yosry-Ahmed/bpf-rstat-cgroup-hierarchical-stats/20220520-093041 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220521/202205211913.wPnVDaPm-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-1) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/203797424b1159b12702cea9d9a20acc24ea92e0 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Yosry-Ahmed/bpf-rstat-cgroup-hierarchical-stats/20220520-093041 git checkout 203797424b1159b12702cea9d9a20acc24ea92e0 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash kernel/cgroup/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): kernel/cgroup/rstat.c:155:22: warning: no previous prototype for 'bpf_rstat_flush' [-Wmissing-prototypes] 155 | __weak noinline void bpf_rstat_flush(struct cgroup *cgrp, | ^~~~~~~~~~~~~~~ kernel/cgroup/rstat.c:503:10: error: 'const struct btf_kfunc_id_set' has no member named 'sleepable_set'; did you mean 'release_set'? 503 | .sleepable_set = &bpf_rstat_sleepable_kfunc_ids, | ^~~~~~~~~~~~~ | release_set >> kernel/cgroup/rstat.c:503:27: warning: excess elements in struct initializer 503 | .sleepable_set = &bpf_rstat_sleepable_kfunc_ids, | ^ kernel/cgroup/rstat.c:503:27: note: (near initialization for 'bpf_rstat_kfunc_set') vim +503 kernel/cgroup/rstat.c 499 500 static const struct btf_kfunc_id_set bpf_rstat_kfunc_set = { 501 .owner = THIS_MODULE, 502 .check_set = &bpf_rstat_check_kfunc_ids, > 503 .sleepable_set = &bpf_rstat_sleepable_kfunc_ids, 504 }; 505 -- 0-DAY CI Kernel Test Service https://01.org/lkp