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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-02-15 17:00:22 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-02-15 17:00:22 +0100 |
| commit | acc3a645ef4bb301366a609730df3cd6a52154a1 (patch) | |
| tree | 9b64ca50d954c29b29fed94656b3a6c916e3aae0 /kernel/kthread.c | |
| parent | e1d3209f95a19df16080b069265e172738189807 (diff) | |
| parent | 8a3f1f181d39892e6ca11485a3c3ec15bb8e1a60 (diff) | |
Merge branches 'pm-cpuidle' and 'pm-cpufreq'
* pm-cpuidle:
MAINTAINERS: cpuidle: exynos: include header in file pattern
intel_idle: remove definition of DEBUG
* pm-cpufreq:
cpufreq: Remove unused flag CPUFREQ_PM_NO_WARN
cpufreq: Remove CPUFREQ_STICKY flag
cpufreq: intel_pstate: Remove repeated word
cpufreq: remove tango driver
cpufreq: brcmstb-avs-cpufreq: Fix resource leaks in ->remove()
cpufreq: brcmstb-avs-cpufreq: Free resources in error path
cpufreq: qcom-hw: enable boost support
cpufreq: tegra20: Use resource-managed API
cpufreq: intel_pstate: Get per-CPU max freq via MSR_HWP_CAPABILITIES if available
cpufreq: intel_pstate: Rename two functions
cpufreq: intel_pstate: Change intel_pstate_get_hwp_max() argument
cpufreq: intel_pstate: Always read hwp_cap_cached with READ_ONCE()
Diffstat (limited to 'kernel/kthread.c')
| -rw-r--r-- | kernel/kthread.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index a5eceecd4513..1578973c5740 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -294,7 +294,7 @@ static int kthread(void *_create) do_exit(ret); } -/* called from do_fork() to get node information for about to be created task */ +/* called from kernel_clone() to get node information for about to be created task */ int tsk_fork_get_node(struct task_struct *tsk) { #ifdef CONFIG_NUMA @@ -493,11 +493,36 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data), return p; kthread_bind(p, cpu); /* CPU hotplug need to bind once again when unparking the thread. */ - set_bit(KTHREAD_IS_PER_CPU, &to_kthread(p)->flags); to_kthread(p)->cpu = cpu; return p; } +void kthread_set_per_cpu(struct task_struct *k, int cpu) +{ + struct kthread *kthread = to_kthread(k); + if (!kthread) + return; + + WARN_ON_ONCE(!(k->flags & PF_NO_SETAFFINITY)); + + if (cpu < 0) { + clear_bit(KTHREAD_IS_PER_CPU, &kthread->flags); + return; + } + + kthread->cpu = cpu; + set_bit(KTHREAD_IS_PER_CPU, &kthread->flags); +} + +bool kthread_is_per_cpu(struct task_struct *k) +{ + struct kthread *kthread = to_kthread(k); + if (!kthread) + return false; + + return test_bit(KTHREAD_IS_PER_CPU, &kthread->flags); +} + /** * kthread_unpark - unpark a thread created by kthread_create(). * @k: thread created by kthread_create(). |