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 missing matching call to put_cpu_var(), which

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 NIP

[PATCH] powerpc/perf: add missing put_cpu_var in power_pmu_event_init

2015-03-24 Thread Jan Stancek
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 NIP = 3fff9bf2cae0 MSR = 90014280f032 Oops: Weird page