diff options
| author | Tejun Heo <tj@kernel.org> | 2012-11-06 12:26:23 -0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2012-11-06 12:26:23 -0800 |
| commit | 5b805f2a7675634fbdf9ac1c9b2256905ab2ea68 (patch) | |
| tree | ee00d1e3d757458d66209b926d274491c6c3f61c /arch/arm/kernel/perf_event.c | |
| parent | 1db1e31b1ee3ae126ef98f39083b5f213c7b41bf (diff) | |
| parent | 201e72acb2d3821e2de9ce6091e98859c316b29a (diff) | |
Merge branch 'cgroup/for-3.7-fixes' into cgroup/for-3.8
This is to receive device_cgroup fixes so that further device_cgroup
changes can be made in cgroup/for-3.8.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/arm/kernel/perf_event.c')
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 93971b1a4f0..53c0304b734 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -96,6 +96,10 @@ armpmu_event_set_period(struct perf_event *event, s64 period = hwc->sample_period; int ret = 0; + /* The period may have been changed by PERF_EVENT_IOC_PERIOD */ + if (unlikely(period != hwc->last_period)) + left = period - (hwc->last_period - left); + if (unlikely(left <= -period)) { left = period; local64_set(&hwc->period_left, left); |