ARM/mvebu: Convert to hotplug state machine

Install the callbacks via the state machine.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Gregory Clement <gregory.clement@free-electrons.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160713153333.503198935@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c
index 7e989d6..77aaa52 100644 (file)
--- a/arch/arm/mach-mvebu/coherency.c
+++ b/arch/arm/mach-mvebu/coherency.c
@@ -111,20 +111,12 @@ static struct notifier_block mvebu_hwcc_pci_nb __maybe_unused = {
        .notifier_call = mvebu_hwcc_notifier,
 };
 
-static int armada_xp_clear_shared_l2_notifier_func(struct notifier_block *nfb,
-                                       unsigned long action, void *hcpu)
+static int armada_xp_clear_l2_starting(unsigned int cpu)
 {
-       if (action == CPU_STARTING || action == CPU_STARTING_FROZEN)
-               armada_xp_clear_shared_l2();
-
-       return NOTIFY_OK;
+       armada_xp_clear_shared_l2();
+       return 0;
 }
 
-static struct notifier_block armada_xp_clear_shared_l2_notifier = {
-       .notifier_call = armada_xp_clear_shared_l2_notifier_func,
-       .priority = 100,
-};
-
 static void __init armada_370_coherency_init(struct device_node *np)
 {
        struct resource res;
@@ -155,8 +147,9 @@ static void __init armada_370_coherency_init(struct device_node *np)
 
        of_node_put(cpu_config_np);
 
-       register_cpu_notifier(&armada_xp_clear_shared_l2_notifier);
-
+       cpuhp_setup_state_nocalls(CPUHP_AP_ARM_MVEBU_COHERENCY,
+                                 "AP_ARM_MVEBU_COHERENCY",
+                                 armada_xp_clear_l2_starting, NULL);
 exit:
        set_cpu_coherent();
 }

diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 420cfcf..d769ec9 100644 (file)
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -15,6 +15,7 @@ enum cpuhp_state {
        CPUHP_AP_IRQ_ARMADA_XP_STARTING,
        CPUHP_AP_IRQ_ARMADA_CASC_STARTING,
        CPUHP_AP_IRQ_BCM2836_STARTING,
+       CPUHP_AP_ARM_MVEBU_COHERENCY,
        CPUHP_AP_NOTIFY_STARTING,
        CPUHP_AP_ONLINE,
        CPUHP_TEARDOWN_CPU,