diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-09-07 13:19:01 -0400 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2016-09-30 11:23:04 +0100 |
| commit | c8761e2016aa51a2829563b02a0a55913bdb0be8 (patch) | |
| tree | cbceacae7a9d60efbedd2afc5f5bea1041a50c87 | |
| parent | 4d737042d6c4ee10a632cf94b953169d13955a40 (diff) | |
xen/events: Convert to hotplug state machine
Install the callbacks via the state machine.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
| -rw-r--r-- | drivers/xen/events/events_fifo.c | 34 | ||||
| -rw-r--r-- | include/linux/cpuhotplug.h | 1 |
2 files changed, 13 insertions, 22 deletions
diff --git a/drivers/xen/events/events_fifo.c b/drivers/xen/events/events_fifo.c index 266c2c733039..7ef27c6ed72f 100644 --- a/drivers/xen/events/events_fifo.c +++ b/drivers/xen/events/events_fifo.c @@ -418,30 +418,18 @@ static int evtchn_fifo_alloc_control_block(unsigned cpu) return ret; } -static int evtchn_fifo_cpu_notification(struct notifier_block *self, - unsigned long action, - void *hcpu) +static int xen_evtchn_cpu_prepare(unsigned int cpu) { - int cpu = (long)hcpu; - int ret = 0; - - switch (action) { - case CPU_UP_PREPARE: - if (!per_cpu(cpu_control_block, cpu)) - ret = evtchn_fifo_alloc_control_block(cpu); - break; - case CPU_DEAD: - __evtchn_fifo_handle_events(cpu, true); - break; - default: - break; - } - return ret < 0 ? NOTIFY_BAD : NOTIFY_OK; + if (!per_cpu(cpu_control_block, cpu)) + return evtchn_fifo_alloc_control_block(cpu); + return 0; } -static struct notifier_block evtchn_fifo_cpu_notifier = { - .notifier_call = evtchn_fifo_cpu_notification, -}; +static int xen_evtchn_cpu_dead(unsigned int cpu) +{ + __evtchn_fifo_handle_events(cpu, true); + return 0; +} int __init xen_evtchn_fifo_init(void) { @@ -456,7 +444,9 @@ int __init xen_evtchn_fifo_init(void) evtchn_ops = &evtchn_ops_fifo; - register_cpu_notifier(&evtchn_fifo_cpu_notifier); + cpuhp_setup_state_nocalls(CPUHP_XEN_EVTCHN_PREPARE, + "CPUHP_XEN_EVTCHN_PREPARE", + xen_evtchn_cpu_prepare, xen_evtchn_cpu_dead); out: put_cpu(); return ret; diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h index 33d352f3295d..5f603166831c 100644 --- a/include/linux/cpuhotplug.h +++ b/include/linux/cpuhotplug.h @@ -22,6 +22,7 @@ enum cpuhp_state { CPUHP_SMPCFD_PREPARE, CPUHP_RCUTREE_PREP, CPUHP_XEN_PREPARE, + CPUHP_XEN_EVTCHN_PREPARE, CPUHP_NOTIFY_PREPARE, CPUHP_TIMERS_DEAD, CPUHP_BRINGUP_CPU, |