[tip:smp/hotplug] ia64/mca: Convert to hotplug state machine

tip-bot for Sebastian Andrzej Siewior
2016-09-19T19:55:15Z

Commit-ID: 6b8d642239e866debbaa37f25e53837a5d141f33
Gitweb: http://git.kernel.org/tip/6b8d642239e866debbaa37f25e53837a5d141f33
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
AuthorDate: Tue, 6 Sep 2016 19:04:40 +0200
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Mon, 19 Sep 2016 21:44:26 +0200

ia64/mca: Convert to hotplug state machine

Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-ia64@vger.kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160906170457.32393-5-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
arch/ia64/kernel/mca.c | 26 ++++----------------------
1 file changed, 4 insertions(+), 22 deletions(-)

diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index eb9220c..c2858865 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1890,7 +1890,7 @@ ia64_mca_cpu_init(void *cpu_data)
PAGE_KERNEL)));
}

-static void ia64_mca_cmc_vector_adjust(void *dummy)
+static int ia64_mca_cpu_online(unsigned int cpu)
{
unsigned long flags;

@@ -1898,25 +1898,9 @@ static void ia64_mca_cmc_vector_adjust(void *dummy)
if (!cmc_polling_enabled)
ia64_mca_cmc_vector_enable(NULL);
local_irq_restore(flags);
+ return 0;
}

-static int mca_cpu_callback(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
-{
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- ia64_mca_cmc_vector_adjust(NULL);
- break;
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block mca_cpu_notifier = {
- .notifier_call = mca_cpu_callback
-};
-
/*
* ia64_mca_init
*
@@ -2111,15 +2095,13 @@ ia64_mca_late_init(void)
if (!mca_init)
return 0;

- register_hotcpu_notifier(&mca_cpu_notifier);
-
/* Setup the CMCI/P vector and handler */
setup_timer(&cmc_poll_timer, ia64_mca_cmc_poll, 0UL);

/* Unmask/enable the vector */
cmc_polling_enabled = 0;
- schedule_work(&cmc_enable_work);
-
+ cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "ia64/mca:online",
+ ia64_mca_cpu_online, NULL);
IA64_MCA_DEBUG("%s: CMCI/P setup and enabled.\n", __func__);

#ifdef CONFIG_ACPI