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.
Unified · Split
| @@ -517,6 +517,13 @@ static int cpuhp_invoke_ap_callback(int cpu, enum cpuhp_state state, · 516 unmodified lines | |||
| 517 | if (!cpu_online(cpu)) | 517 | if (!cpu_online(cpu)) |
| 518 | return 0; | 518 | return 0; |
| 519 | 519 | ||
| 520 | /* | ||
| 521 | * If we are up and running, use the hotplug thread. For early calls | ||
| 522 | * we invoke the thread function directly. | ||
| 523 | */ | ||
| 524 | if (!st->thread) | ||
| 525 | return cpuhp_invoke_callback(cpu, state, cb); | ||
| 526 | |||
| 520 | st->cb_state = state; | 527 | st->cb_state = state; |
| 521 | st->cb = cb; | 528 | st->cb = cb; |
| 522 | /* | 529 | /* |