diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2016-02-22 22:19:25 +0000 |
---|---|---|
committer | Ingo Molnar <mingo@kernel.org> | 2016-02-29 09:35:25 +0100 |
commit | a208749c642618b6c106874153906b53f8e2ded9 (patch) | |
tree | 9c35255bfe4beb522859f8221cdfc5e041b18873 /arch | |
parent | 7162b8fea63061b6231bc5e8a0fed55167e71b4c (diff) | |
download | linux-a208749c642618b6c106874153906b53f8e2ded9.tar.bz2 |
perf/x86/intel/rapl: Make PMU lock raw
This lock is taken in hard interrupt context even on Preempt-RT. Make it raw
so RT does not have to patch it.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Harish Chegondi <harish.chegondi@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20160222221012.669411833@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/events/intel/rapl.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/x86/events/intel/rapl.c b/arch/x86/events/intel/rapl.c index ba5043b12c3e..29349990e11c 100644 --- a/arch/x86/events/intel/rapl.c +++ b/arch/x86/events/intel/rapl.c @@ -120,7 +120,7 @@ static struct perf_pmu_events_attr event_attr_##v = { \ }; struct rapl_pmu { - spinlock_t lock; + raw_spinlock_t lock; int n_active; struct list_head active_list; struct pmu *pmu; @@ -210,12 +210,12 @@ static enum hrtimer_restart rapl_hrtimer_handle(struct hrtimer *hrtimer) if (!pmu->n_active) return HRTIMER_NORESTART; - spin_lock_irqsave(&pmu->lock, flags); + raw_spin_lock_irqsave(&pmu->lock, flags); list_for_each_entry(event, &pmu->active_list, active_entry) rapl_event_update(event); - spin_unlock_irqrestore(&pmu->lock, flags); + raw_spin_unlock_irqrestore(&pmu->lock, flags); hrtimer_forward_now(hrtimer, pmu->timer_interval); @@ -252,9 +252,9 @@ static void rapl_pmu_event_start(struct perf_event *event, int mode) struct rapl_pmu *pmu = __this_cpu_read(rapl_pmu); unsigned long flags; - spin_lock_irqsave(&pmu->lock, flags); + raw_spin_lock_irqsave(&pmu->lock, flags); __rapl_pmu_event_start(pmu, event); - spin_unlock_irqrestore(&pmu->lock, flags); + raw_spin_unlock_irqrestore(&pmu->lock, flags); } static void rapl_pmu_event_stop(struct perf_event *event, int mode) @@ -263,7 +263,7 @@ static void rapl_pmu_event_stop(struct perf_event *event, int mode) struct hw_perf_event *hwc = &event->hw; unsigned long flags; - spin_lock_irqsave(&pmu->lock, flags); + raw_spin_lock_irqsave(&pmu->lock, flags); /* mark event as deactivated and stopped */ if (!(hwc->state & PERF_HES_STOPPED)) { @@ -288,7 +288,7 @@ static void rapl_pmu_event_stop(struct perf_event *event, int mode) hwc->state |= PERF_HES_UPTODATE; } - spin_unlock_irqrestore(&pmu->lock, flags); + raw_spin_unlock_irqrestore(&pmu->lock, flags); } static int rapl_pmu_event_add(struct perf_event *event, int mode) @@ -297,14 +297,14 @@ static int rapl_pmu_event_add(struct perf_event *event, int mode) struct hw_perf_event *hwc = &event->hw; unsigned long flags; - spin_lock_irqsave(&pmu->lock, flags); + raw_spin_lock_irqsave(&pmu->lock, flags); hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED; if (mode & PERF_EF_START) __rapl_pmu_event_start(pmu, event); - spin_unlock_irqrestore(&pmu->lock, flags); + raw_spin_unlock_irqrestore(&pmu->lock, flags); return 0; } @@ -567,7 +567,7 @@ static int rapl_cpu_prepare(int cpu) pmu = kzalloc_node(sizeof(*pmu), GFP_KERNEL, cpu_to_node(cpu)); if (!pmu) return -1; - spin_lock_init(&pmu->lock); + raw_spin_lock_init(&pmu->lock); INIT_LIST_HEAD(&pmu->active_list); |