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authorThomas Gleixner <tglx@linutronix.de>2016-07-13 17:17:03 +0000
committerIngo Molnar <mingo@kernel.org>2016-07-15 10:41:44 +0200
commit4df8374254ea9294dfe4b8c447a1b7eddc543dbf (patch)
treeb2223178530e7c18e36caa40cfeb1780578d18d2 /kernel/cpu.c
parent15d7e3d349a329ad48a29c3a818eacd1c3f7e3ef (diff)
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 <tglx@linutronix.de> Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: rt@linutronix.de Link: http://lkml.kernel.org/r/20160713153337.982013161@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/cpu.c')
-rw-r--r--kernel/cpu.c14
1 files changed, 14 insertions, 0 deletions
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