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| author | Olof Johansson <olof@lixom.net> | 2012-11-06 07:51:06 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2012-11-06 07:51:06 -0800 |
| commit | 66267ee58732bb4c21c7bbba004ee481b8ad2b30 (patch) | |
| tree | bf7f72e623d7c1ca6472e0a1286e802cd3bff139 /arch/arm/kernel/perf_event.c | |
| parent | 6ed68a6d83e4497dc33581ccc82b4fa3e7e8226d (diff) | |
| parent | f58007762f537ba13674a3138b3f4c20fff1cba9 (diff) | |
| download | linux-66267ee58732bb4c21c7bbba004ee481b8ad2b30.tar.gz | |
Merge branch 'arm-next' of git://git.xilinx.com/linux-xlnx into next/cleanup
From Michal Simek:
* 'arm-next' of git://git.xilinx.com/linux-xlnx:
zynq: move static peripheral mappings
zynq: remove use of CLKDEV_LOOKUP
zynq: use pl310 device tree bindings
zynq: use GIC device tree bindings
+ Linux 3.7-rc3
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 93971b1a4f0b..53c0304b734a 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); |