diff options
| author | Robert Richter <robert.richter@amd.com> | 2012-04-02 22:19:08 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-09 17:23:12 +0400 |
| commit | fd0d000b2c34aa43d4e92dcf0dfaeda7e123008a (patch) | |
| tree | 8b81831cf37f1be6dd3cc9be772952d5c835a550 /arch/alpha | |
| parent | c75841a398d667d9968245b9519d93cedbfb4780 (diff) | |
| download | linux-fd0d000b2c34aa43d4e92dcf0dfaeda7e123008a.tar.xz | |
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/alpha')
| -rw-r--r-- | arch/alpha/kernel/perf_event.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c index 0dae252f7a33..d821b17047e0 100644 --- a/arch/alpha/kernel/perf_event.c +++ b/arch/alpha/kernel/perf_event.c @@ -824,7 +824,6 @@ static void alpha_perf_event_irq_handler(unsigned long la_ptr, idx = la_ptr; - perf_sample_data_init(&data, 0); for (j = 0; j < cpuc->n_events; j++) { if (cpuc->current_idx[j] == idx) break; @@ -848,7 +847,7 @@ static void alpha_perf_event_irq_handler(unsigned long la_ptr, hwc = &event->hw; alpha_perf_event_update(event, hwc, idx, alpha_pmu->pmc_max_period[idx]+1); - data.period = event->hw.last_period; + perf_sample_data_init(&data, 0, hwc->last_period); if (alpha_perf_event_set_period(event, hwc, idx)) { if (perf_event_overflow(event, &data, regs)) { |