From 4df8374254ea9294dfe4b8c447a1b7eddc543dbf Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Wed, 13 Jul 2016 17:17:03 +0000 Subject: rcu: Convert rcutree to hotplug state machine Straight forward conversion to the state machine. Though the question arises whether this needs really all these state transitions to work. Signed-off-by: Thomas Gleixner Signed-off-by: Anna-Maria Gleixner Reviewed-by: Sebastian Andrzej Siewior Cc: Linus Torvalds Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153337.982013161@linutronix.de Signed-off-by: Ingo Molnar --- kernel/cpu.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'kernel/cpu.c') diff --git a/kernel/cpu.c b/kernel/cpu.c index 008e2fd40cb1..f24f45915b54 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -1205,6 +1205,11 @@ static struct cpuhp_step cpuhp_bp_states[] = { .startup = NULL, .teardown = timers_dead_cpu, }, + [CPUHP_RCUTREE_PREP] = { + .name = "RCU-tree prepare", + .startup = rcutree_prepare_cpu, + .teardown = rcutree_dead_cpu, + }, /* * Preparatory and dead notifiers. Will be replaced once the notifiers * are converted to states. @@ -1263,6 +1268,10 @@ static struct cpuhp_step cpuhp_ap_states[] = { .startup = sched_cpu_starting, .teardown = sched_cpu_dying, }, + [CPUHP_AP_RCUTREE_DYING] = { + .startup = NULL, + .teardown = rcutree_dying_cpu, + }, /* * Low level startup/teardown notifiers. Run with interrupts * disabled. Will be removed once the notifiers are converted to @@ -1296,6 +1305,11 @@ static struct cpuhp_step cpuhp_ap_states[] = { .startup = workqueue_online_cpu, .teardown = workqueue_offline_cpu, }, + [CPUHP_AP_RCUTREE_ONLINE] = { + .name = "RCU-tree online", + .startup = rcutree_online_cpu, + .teardown = rcutree_offline_cpu, + }, /* * Online/down_prepare notifiers. Will be removed once the notifiers -- cgit v1.2.3-55-g7522