From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: linux-kernel@vger.kernel.org
Cc: rt@linuxtronix.de,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Tony Luck <tony.luck@intel.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, linux-edac@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 01/20] x86/mce/therm_throt: Convert to hotplug state machine
Date: Thu, 17 Nov 2016 19:35:22 +0100 [thread overview]
Message-ID: <20161117183541.8588-2-bigeasy@linutronix.de> (raw)
In-Reply-To: <20161117183541.8588-1-bigeasy@linutronix.de>
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.
Cc: Tony Luck <tony.luck@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: x86@kernel.org
Cc: linux-edac@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/cpu/mcheck/therm_throt.c | 53 ++++++++------------------------
include/linux/cpuhotplug.h | 1 +
2 files changed, 13 insertions(+), 41 deletions(-)
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 6b9dc4d18ccc..7f56620735ca 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -271,58 +271,29 @@ static void thermal_throttle_remove_dev(struct device *dev)
}
/* Get notified when a cpu comes on/off. Be hotplug friendly. */
-static int
-thermal_throttle_cpu_callback(struct notifier_block *nfb,
- unsigned long action,
- void *hcpu)
+static int thermal_throttle_prepare(unsigned int cpu)
{
- unsigned int cpu = (unsigned long)hcpu;
- struct device *dev;
- int err = 0;
+ struct device *dev = get_cpu_device(cpu);
- dev = get_cpu_device(cpu);
-
- switch (action) {
- case CPU_UP_PREPARE:
- case CPU_UP_PREPARE_FROZEN:
- err = thermal_throttle_add_dev(dev, cpu);
- WARN_ON(err);
- break;
- case CPU_UP_CANCELED:
- case CPU_UP_CANCELED_FROZEN:
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- thermal_throttle_remove_dev(dev);
- break;
- }
- return notifier_from_errno(err);
+ return thermal_throttle_add_dev(dev, cpu);
}
-static struct notifier_block thermal_throttle_cpu_notifier =
+static int thermal_throttle_dead(unsigned int cpu)
{
- .notifier_call = thermal_throttle_cpu_callback,
-};
+ struct device *dev = get_cpu_device(cpu);
+
+ thermal_throttle_remove_dev(dev);
+ return 0;
+}
static __init int thermal_throttle_init_device(void)
{
- unsigned int cpu = 0;
- int err;
-
if (!atomic_read(&therm_throt_en))
return 0;
- cpu_notifier_register_begin();
-
- /* connect live CPUs to sysfs */
- for_each_online_cpu(cpu) {
- err = thermal_throttle_add_dev(get_cpu_device(cpu), cpu);
- WARN_ON(err);
- }
-
- __register_hotcpu_notifier(&thermal_throttle_cpu_notifier);
- cpu_notifier_register_done();
-
- return 0;
+ return cpuhp_setup_state(CPUHP_X86_THERM_PREPARE, "x86/therm:prepare",
+ thermal_throttle_prepare,
+ thermal_throttle_dead);
}
device_initcall(thermal_throttle_init_device);
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 79b96f647d64..aea6c6a63139 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -59,6 +59,7 @@ enum cpuhp_state {
CPUHP_BLK_MQ_PREPARE,
CPUHP_NET_FLOW_PREPARE,
CPUHP_TOPOLOGY_PREPARE,
+ CPUHP_X86_THERM_PREPARE,
CPUHP_TIMERS_DEAD,
CPUHP_NOTF_ERR_INJ_PREPARE,
CPUHP_MIPS_SOC_PREPARE,
--
2.10.2
next prev parent reply other threads:[~2016-11-17 18:40 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-17 18:35 cpu hotplug: convert more drivers (batch #5) Sebastian Andrzej Siewior
2016-11-17 18:35 ` Sebastian Andrzej Siewior [this message]
2016-11-21 15:46 ` [tip:smp/hotplug] x86/mce/therm_throt: Convert to hotplug state machine tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:39 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 02/20] x86/cpuid: " Sebastian Andrzej Siewior
2016-11-21 15:47 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:40 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 03/20] x86/msr: " Sebastian Andrzej Siewior
2016-11-21 15:48 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:41 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 04/20] hwmon/coretemp: " Sebastian Andrzej Siewior
2016-11-20 22:30 ` [04/20] " Guenter Roeck
2016-11-21 22:35 ` Sebastian Andrzej Siewior
2016-11-21 15:56 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-21 21:32 ` Guenter Roeck
2016-11-21 21:53 ` Thomas Gleixner
2016-11-17 18:35 ` [PATCH 05/20] hwmon/via-cputemp: Remove pointless CPU check on each CPU Sebastian Andrzej Siewior
2016-11-19 17:23 ` [05/20] " Guenter Roeck
2016-11-19 22:53 ` Sebastian Andrzej Siewior
2016-11-20 3:53 ` Guenter Roeck
2016-11-20 20:34 ` Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 06/20] hwmon/via-cputemp: Convert to hotplug state machine Sebastian Andrzej Siewior
2016-11-18 15:09 ` [PATCH 06/20 v2] " Sebastian Andrzej Siewior
2016-11-23 15:29 ` [PATCH 06/20] " Guenter Roeck
2016-12-09 11:53 ` Thomas Gleixner
2016-12-09 18:17 ` Guenter Roeck
2016-12-09 18:27 ` Thomas Gleixner
2016-11-17 18:35 ` [PATCH 07/20] pci/xgene-msi: " Sebastian Andrzej Siewior
2016-11-21 15:48 ` [tip:smp/hotplug] PCI/xgene-msi: " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:42 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 08/20] powercap/intel_rapl: Add missing domain data update on hotplug Sebastian Andrzej Siewior
2016-11-21 15:49 ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-11-17 18:35 ` [PATCH 09/20] powercap/intel rapl: Convert to hotplug state machine Sebastian Andrzej Siewior
2016-11-21 15:49 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 10/20] powercap/intel_rapl: Cleanup duplicated init code Sebastian Andrzej Siewior
2016-11-21 15:50 ` [tip:smp/hotplug] " tip-bot for Thomas Gleixner
2016-11-17 18:35 ` [PATCH 11/20] watchdog/octeon: Convert to hotplug state machine Sebastian Andrzej Siewior
2016-11-21 15:50 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:43 ` tip-bot for Sebastian Andrzej Siewior
2016-11-24 16:10 ` [11/20] " Guenter Roeck
2016-11-17 18:35 ` [PATCH 12/20] net/iucv: " Sebastian Andrzej Siewior
2016-11-21 15:51 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:43 ` tip-bot for Sebastian Andrzej Siewior
2016-11-23 18:04 ` [PATCH 12/20] " Ursula Braun
2016-11-24 9:10 ` Sebastian Andrzej Siewior
2016-11-24 14:14 ` [PATCH 12/20 v2] " Sebastian Andrzej Siewior
2016-11-24 16:10 ` [PATCH] net/iucv: use explicit clean up labels in iucv_init() Sebastian Andrzej Siewior
2016-11-24 19:57 ` [tip:smp/hotplug] net/iucv: Use " tip-bot for Sebastian Andrzej Siewior
2016-11-28 16:24 ` [PATCH] net/iucv: use " David Miller
2016-11-28 16:31 ` Thomas Gleixner
2016-11-28 16:37 ` [tip:smp/hotplug] net/iucv: Use " tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 13/20] sched/nohz: Convert to hotplug state machine Sebastian Andrzej Siewior
2016-11-21 15:51 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:44 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 14/20] arm/bL_switcher: " Sebastian Andrzej Siewior
2016-11-21 15:52 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:44 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 15/20] ARM/hw_breakpoint: " Sebastian Andrzej Siewior
2016-11-18 12:04 ` Will Deacon
2016-11-18 13:11 ` Thomas Gleixner
2016-11-18 13:29 ` Will Deacon
2016-11-18 13:42 ` Thomas Gleixner
2016-11-18 13:48 ` Will Deacon
2016-11-18 13:59 ` Thomas Gleixner
2016-11-18 14:11 ` Will Deacon
2016-11-21 15:52 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:45 ` tip-bot for Sebastian Andrzej Siewior
2017-01-02 14:15 ` [PATCH 15/20] " Linus Walleij
2017-01-02 14:34 ` Linus Walleij
2017-01-02 15:00 ` Russell King - ARM Linux
2017-01-02 20:15 ` Linus Walleij
2017-01-03 9:33 ` Mark Rutland
2017-01-04 11:27 ` Sebastian Andrzej Siewior
2017-01-04 13:56 ` Mark Rutland
2017-01-04 14:32 ` Will Deacon
2017-01-05 15:57 ` Mark Rutland
2017-01-05 15:26 ` Linus Walleij
2017-01-05 17:14 ` Mark Rutland
2016-11-17 18:35 ` [PATCH 16/20] powerpc/sysfs: " Sebastian Andrzej Siewior
2016-11-21 15:53 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:45 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 17/20] sparc/sysfs: " Sebastian Andrzej Siewior
2016-11-17 18:39 ` David Miller
2016-11-21 15:54 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:46 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 18/20] x86/oprofile/nmi: Remove superfluous smp_function_call_single() Sebastian Andrzej Siewior
2016-11-21 15:54 ` [tip:smp/hotplug] " tip-bot for Anna-Maria Gleixner
2016-11-22 22:46 ` tip-bot for Anna-Maria Gleixner
2016-11-17 18:35 ` [PATCH 19/20] x86/oprofile/nmi: Convert to hotplug state machine Sebastian Andrzej Siewior
2016-11-21 15:55 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:47 ` tip-bot for Sebastian Andrzej Siewior
2016-11-17 18:35 ` [PATCH 20/20] x86/pci/amd-bus: " Sebastian Andrzej Siewior
2016-11-21 15:55 ` [tip:smp/hotplug] " tip-bot for Sebastian Andrzej Siewior
2016-11-22 22:47 ` tip-bot for Sebastian Andrzej Siewior
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