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In scx-cid patchsets, sched_ext selftest failed to build with following error: non_scx_kfunc_deny.bpf.c:17:6: error: conflicting types for 'scx_bpf_kick_cpu' 17 | void scx_bpf_kick_cpu(s32 cpu, u64 flags) __ksym; | ^ tools/testing/selftests/sched_ext/build/include/vmlinux.h:136300:13: note: previous declaration is here 136300 | extern void scx_bpf_kick_cpu(s32 cpu, u64 flags, const struct bpf_prog_aux *aux) __weak __ksym; | ^ non_scx_kfunc_deny.bpf.c:26:23: error: too few arguments to function call, expected 3, have 2 26 | scx_bpf_kick_cpu(0, 0); | ~~~~~~~~~~~~~~~~ ^ tools/testing/selftests/sched_ext/build/include/vmlinux.h:136300:13: note: 'scx_bpf_kick_cpu' declared here 136300 | extern void scx_bpf_kick_cpu(s32 cpu, u64 flags, const struct bpf_prog_aux *aux) __weak __ksym; The root cause is on scx core part, but we can avoid this by including common.bpf.h and remove scx_bpf_kick_cpu() to make it more robust, just like the usage in other xx.bpf.c. Link: https://lore.kernel.org/sched-ext/20260421071945.3110084-1-tj@kernel.org/ Signed-off-by: Zhao Mengmeng <zhaomengmeng@kylinos.cn> Tested-by: Cheng-Yang Chou <yphbchou0911@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>