From: Thomas Gleixner <[email protected]> We switched the hotplug machinery to smpboot threads. Early registration of hotplug callbacks, i.e. from do_pre_smp_initcalls(), happens before the threads are initialized. Instead of moving the thread init, we simply handle it in the hotplug code itself and invoke the function directly.
Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Anna-Maria Gleixner <[email protected]> --- kernel/cpu.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -517,6 +517,13 @@ static int cpuhp_invoke_ap_callback(int if (!cpu_online(cpu)) return 0; + /* + * If we are up and running, use the hotplug thread. For early calls + * we invoke the thread function directly. + */ + if (!st->thread) + return cpuhp_invoke_callback(cpu, state, cb); + st->cb_state = state; st->cb = cb; /*
