Hi all, After merging the tip tree, yesterday's linux-next build (x86_64 allnoconfig) produced this warning: kernel/cpu.c:129:13: warning: 'cpuhp_is_ap_state' defined but not used [-Wunused-function] static bool cpuhp_is_ap_state(enum cpuhp_state state) ^~~~~~~~~~~~~~~~~ Introduced by commit 17a2f1ced028 ("cpu/hotplug: Merge cpuhp_bp_states and cpuhp_ap_states") -- Cheers, Stephen Rothwell