evie/android_kernel_oneplus_msm8998
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Merge "sched: Ensure proper synch between isolation, hotplug, and suspend"

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Linux Build Service Account 2016-11-27 19:40:22 -08:00 • committed by Gerrit - the friendly Code Review server
commit 9aa1df0cf5
2 changed files with 7 additions and 13 deletions
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10
kernel/sched/core.c
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@ -5682,7 +5682,7 @@ int sched_isolate_cpu(int cpu)
if (trace_sched_isolate_enabled())
start_time = sched_clock();
lock_device_hotplug();
cpu_maps_update_begin();
cpumask_andnot(&avail_cpus, cpu_online_mask, cpu_isolated_mask);
@ -5731,7 +5731,7 @@ int sched_isolate_cpu(int cpu)
sched_update_group_capacities(cpu);
out:
unlock_device_hotplug();
cpu_maps_update_done();
trace_sched_isolate(cpu, cpumask_bits(cpu_isolated_mask)[0],
start_time, 1);
return ret_code;
@ -5752,8 +5752,6 @@ int sched_unisolate_cpu_unlocked(int cpu)
if (trace_sched_isolate_enabled())
start_time = sched_clock();
lock_device_hotplug_assert();
if (!cpu_isolation_vote[cpu]) {
ret_code = -EINVAL;
goto out;
@ -5792,9 +5790,9 @@ int sched_unisolate_cpu(int cpu)
{
int ret_code;
lock_device_hotplug();
cpu_maps_update_begin();
ret_code = sched_unisolate_cpu_unlocked(cpu);
unlock_device_hotplug();
cpu_maps_update_done();
return ret_code;
}

10
kernel/sched/core_ctl.c
View file

@ -893,14 +893,10 @@ static int __ref cpu_callback(struct notifier_block *nfb,
unsigned int need;
int ret = NOTIFY_OK;
/* Don't affect suspend resume */
if (action & CPU_TASKS_FROZEN)
return NOTIFY_OK;
if (unlikely(!cluster || !cluster->inited))
return NOTIFY_OK;
switch (action) {
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_UP_PREPARE:
/* If online state of CPU somehow got out of sync, fix it. */
@ -1095,7 +1091,7 @@ static int __init core_ctl_init(void)
cpufreq_register_notifier(&cpufreq_pol_nb, CPUFREQ_POLICY_NOTIFIER);
cpufreq_register_notifier(&cpufreq_gov_nb, CPUFREQ_GOVINFO_NOTIFIER);
lock_device_hotplug();
cpu_maps_update_begin();
for_each_online_cpu(cpu) {
struct cpufreq_policy *policy;
int ret;
@ -1109,7 +1105,7 @@ static int __init core_ctl_init(void)
cpufreq_cpu_put(policy);
}
}
unlock_device_hotplug();
cpu_maps_update_done();
initialized = true;
return 0;
}