[tip:smp/hotplug] mips/octeon/smp: Convert to hotplug state machine

tip-bot for Sebastian Andrzej Siewior
2016-09-19T19:58:49Z

Commit-ID: dd6d7c6f3dc136c1bec6def840f7fa53f84d1fe6
Gitweb: http://git.kernel.org/tip/dd6d7c6f3dc136c1bec6def840f7fa53f84d1fe6
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
AuthorDate: Tue, 6 Sep 2016 19:04:51 +0200
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Mon, 19 Sep 2016 21:44:32 +0200

mips/octeon/smp: Convert to hotplug state machine

Install the callbacks via the state machine.

[ tglx: Renamed the state to MIPS_SOC_PREPARE so it can be reused by other
SOCs ]

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160906170457.32393-16-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
arch/mips/cavium-octeon/smp.c | 24 +++---------------------
include/linux/cpuhotplug.h | 1 +
2 files changed, 4 insertions(+), 21 deletions(-)

diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
index 4d457d60..256fe6f 100644
--- a/arch/mips/cavium-octeon/smp.c
+++ b/arch/mips/cavium-octeon/smp.c
@@ -380,29 +380,11 @@ static int octeon_update_boot_vector(unsigned int cpu)
return 0;
}

-static int octeon_cpu_callback(struct notifier_block *nfb,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_UP_PREPARE:
- octeon_update_boot_vector(cpu);
- break;
- case CPU_ONLINE:
- pr_info("Cpu %d online\n", cpu);
- break;
- case CPU_DEAD:
- break;
- }
-
- return NOTIFY_OK;
-}
-
static int register_cavium_notifier(void)
{
- hotcpu_notifier(octeon_cpu_callback, 0);
- return 0;
+ return cpuhp_setup_state_nocalls(CPUHP_MIPS_SOC_PREPARE,
+ "mips/cavium:prepare",
+ octeon_update_boot_vector, NULL);
}
late_initcall(register_cavium_notifier);

diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index bb6231d..8f8a48b 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -44,6 +44,7 @@ enum cpuhp_state {
CPUHP_SH_SH3X_PREPARE,
CPUHP_TIMERS_DEAD,
CPUHP_NOTF_ERR_INJ_PREPARE,
+ CPUHP_MIPS_SOC_PREPARE,
CPUHP_BRINGUP_CPU,
CPUHP_AP_IDLE_DEAD,
CPUHP_AP_OFFLINE,