Re: powerpc/perf: add missing put_cpu_var in power_pmu_event_init

2015-03-25 Thread Jan Stancek
...@jms.id.au > Sent: Wednesday, 25 March, 2015 6:25:09 AM > Subject: Re: powerpc/perf: add missing put_cpu_var in power_pmu_event_init > > On Tue, 2015-24-03 at 12:33:22 UTC, Jan Stancek wrote: > > One path in power_pmu_event_init() calls get_cpu_var(), but is > > miss

Re: powerpc/perf: add missing put_cpu_var in power_pmu_event_init

2015-03-24 Thread Michael Ellerman
On Tue, 2015-24-03 at 12:33:22 UTC, Jan Stancek wrote: > One path in power_pmu_event_init() calls get_cpu_var(), but is > missing matching call to put_cpu_var(), which causes preemption > imbalance and crash in user-space: > > Page fault in user mode with in_atomic() = 1 mm = c01fefa5a280 >