diff options
| author | Robert Richter <robert.richter@amd.com> | 2012-04-02 20:19:08 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-09 15:23:12 +0200 |
| commit | fd0d000b2c34aa43d4e92dcf0dfaeda7e123008a (patch) | |
| tree | 8b81831cf37f1be6dd3cc9be772952d5c835a550 /arch/arm/kernel/perf_event_v7.c | |
| parent | c75841a398d667d9968245b9519d93cedbfb4780 (diff) | |
perf: Pass last sampling period to perf_sample_data_init()
We always need to pass the last sample period to
perf_sample_data_init(), otherwise the event distribution will be
wrong. Thus, modifiyng the function interface with the required period
as argument. So basically a pattern like this:
perf_sample_data_init(&data, ~0ULL);
data.period = event->hw.last_period;
will now be like that:
perf_sample_data_init(&data, ~0ULL, event->hw.last_period);
Avoids unininitialized data.period and simplifies code.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1333390758-10893-3-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/arm/kernel/perf_event_v7.c')
| -rw-r--r-- | arch/arm/kernel/perf_event_v7.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c index 00755d82e2f2..d3c536068162 100644 --- a/arch/arm/kernel/perf_event_v7.c +++ b/arch/arm/kernel/perf_event_v7.c @@ -1077,8 +1077,6 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) */ regs = get_irq_regs(); - perf_sample_data_init(&data, 0); - cpuc = &__get_cpu_var(cpu_hw_events); for (idx = 0; idx < cpu_pmu->num_events; ++idx) { struct perf_event *event = cpuc->events[idx]; @@ -1097,7 +1095,7 @@ static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) hwc = &event->hw; armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; + perf_sample_data_init(&data, 0, hwc->last_period); if (!armpmu_event_set_period(event, hwc, idx)) continue; |