X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=kernel%2Fcpu.c;h=3705d9043c08e7e8ab3d8c243efcac8589e11d53;hb=00e16c3d68fce504e880f59c9bdf23b2a4759d6d;hp=d948e44c471ea89aa2953f7a687c6b5783bbdf0e;hpb=bfb764440d5bee109003295473a0b387bc799222;p=cascardo%2Flinux.git

diff --git a/kernel/cpu.c b/kernel/cpu.c
index d948e44c471e..3705d9043c08 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -517,6 +517,13 @@ static int cpuhp_invoke_ap_callback(int cpu, enum cpuhp_state state,
 	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;
 	/*
@@ -1173,6 +1180,11 @@ static struct cpuhp_step cpuhp_bp_states[] = {
 		.teardown		= NULL,
 		.cant_stop		= true,
 	},
+	[CPUHP_PERF_PREPARE] = {
+		.name = "perf prepare",
+		.startup = perf_event_init_cpu,
+		.teardown = perf_event_exit_cpu,
+	},
 	/*
 	 * Preparatory and dead notifiers. Will be replaced once the notifiers
 	 * are converted to states.
@@ -1201,6 +1213,8 @@ static struct cpuhp_step cpuhp_bp_states[] = {
 		.teardown		= takedown_cpu,
 		.cant_stop		= true,
 	},
+#else
+	[CPUHP_BRINGUP_CPU] = { },
 #endif
 };
 
@@ -1248,6 +1262,12 @@ static struct cpuhp_step cpuhp_ap_states[] = {
 		.startup		= smpboot_unpark_threads,
 		.teardown		= NULL,
 	},
+	[CPUHP_AP_PERF_ONLINE] = {
+		.name = "perf online",
+		.startup = perf_event_init_cpu,
+		.teardown = perf_event_exit_cpu,
+	},
+
 	/*
 	 * Online/down_prepare notifiers. Will be removed once the notifiers
 	 * are converted to states.