diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-03 19:43:08 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-03 19:43:08 -0700 |
commit | 597f03f9d133e9837d00965016170271d4f87dcf (patch) | |
tree | 33bdb5c1104d5b466387f4ae98748c5f4ddd29bb /drivers/cpuidle/cpuidle-powernv.c | |
parent | 999dcbe2414e15e19cdc1f91497d01f262c6e1cf (diff) | |
parent | 0bf71e4d02ffec8ab9a6adecca61d3eed74fc99d (diff) |
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull CPU hotplug updates from Thomas Gleixner:
"Yet another batch of cpu hotplug core updates and conversions:
- Provide core infrastructure for multi instance drivers so the
drivers do not have to keep custom lists.
- Convert custom lists to the new infrastructure. The block-mq custom
list conversion comes through the block tree and makes the diffstat
tip over to more lines removed than added.
- Handle unbalanced hotplug enable/disable calls more gracefully.
- Remove the obsolete CPU_STARTING/DYING notifier support.
- Convert another batch of notifier users.
The relayfs changes which conflicted with the conversion have been
shipped to me by Andrew.
The remaining lot is targeted for 4.10 so that we finally can remove
the rest of the notifiers"
* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
cpufreq: Fix up conversion to hotplug state machine
blk/mq: Reserve hotplug states for block multiqueue
x86/apic/uv: Convert to hotplug state machine
s390/mm/pfault: Convert to hotplug state machine
mips/loongson/smp: Convert to hotplug state machine
mips/octeon/smp: Convert to hotplug state machine
fault-injection/cpu: Convert to hotplug state machine
padata: Convert to hotplug state machine
cpufreq: Convert to hotplug state machine
ACPI/processor: Convert to hotplug state machine
virtio scsi: Convert to hotplug state machine
oprofile/timer: Convert to hotplug state machine
block/softirq: Convert to hotplug state machine
lib/irq_poll: Convert to hotplug state machine
x86/microcode: Convert to hotplug state machine
sh/SH-X3 SMP: Convert to hotplug state machine
ia64/mca: Convert to hotplug state machine
ARM/OMAP/wakeupgen: Convert to hotplug state machine
ARM/shmobile: Convert to hotplug state machine
arm64/FP/SIMD: Convert to hotplug state machine
...
Diffstat (limited to 'drivers/cpuidle/cpuidle-powernv.c')
-rw-r--r-- | drivers/cpuidle/cpuidle-powernv.c | 51 |
1 files changed, 24 insertions, 27 deletions
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c index f7ca891b5b59..7fe442ca38f4 100644 --- a/drivers/cpuidle/cpuidle-powernv.c +++ b/drivers/cpuidle/cpuidle-powernv.c @@ -119,40 +119,30 @@ static struct cpuidle_state powernv_states[CPUIDLE_STATE_MAX] = { .enter = snooze_loop }, }; -static int powernv_cpuidle_add_cpu_notifier(struct notifier_block *n, - unsigned long action, void *hcpu) +static int powernv_cpuidle_cpu_online(unsigned int cpu) { - int hotcpu = (unsigned long)hcpu; - struct cpuidle_device *dev = - per_cpu(cpuidle_devices, hotcpu); + struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu); if (dev && cpuidle_get_driver()) { - switch (action) { - case CPU_ONLINE: - case CPU_ONLINE_FROZEN: - cpuidle_pause_and_lock(); - cpuidle_enable_device(dev); - cpuidle_resume_and_unlock(); - break; + cpuidle_pause_and_lock(); + cpuidle_enable_device(dev); + cpuidle_resume_and_unlock(); + } + return 0; +} - case CPU_DEAD: - case CPU_DEAD_FROZEN: - cpuidle_pause_and_lock(); - cpuidle_disable_device(dev); - cpuidle_resume_and_unlock(); - break; +static int powernv_cpuidle_cpu_dead(unsigned int cpu) +{ + struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu); - default: - return NOTIFY_DONE; - } + if (dev && cpuidle_get_driver()) { + cpuidle_pause_and_lock(); + cpuidle_disable_device(dev); + cpuidle_resume_and_unlock(); } - return NOTIFY_OK; + return 0; } -static struct notifier_block setup_hotplug_notifier = { - .notifier_call = powernv_cpuidle_add_cpu_notifier, -}; - /* * powernv_cpuidle_driver_init() */ @@ -355,7 +345,14 @@ static int __init powernv_processor_idle_init(void) return retval; } - register_cpu_notifier(&setup_hotplug_notifier); + retval = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, + "cpuidle/powernv:online", + powernv_cpuidle_cpu_online, NULL); + WARN_ON(retval < 0); + retval = cpuhp_setup_state_nocalls(CPUHP_CPUIDLE_DEAD, + "cpuidle/powernv:dead", NULL, + powernv_cpuidle_cpu_dead); + WARN_ON(retval < 0); printk(KERN_DEBUG "powernv_idle_driver registered\n"); return 0; } |