From: Mark Rutland Date: Fri, 24 Jun 2011 10:30:59 +0000 (+0100) Subject: ARM: perf: remove event limit from pmu_hw_events X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3fc2c830;p=linux-beck.git ARM: perf: remove event limit from pmu_hw_events Currently the event accounting data in pmu_hw_events is stored in fixed-sized arrays within the structure. This patch refactors the accounting data to allow any number of events to be managed. Signed-off-by: Mark Rutland Reviewed-by: Will Deacon Reviewed-by: Jamie Iles Reviewed-by: Ashwin Chaugule Signed-off-by: Will Deacon --- diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 7f31eff00b80..e1db55500784 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -42,13 +42,13 @@ struct cpu_hw_events { /* * The events that are active on the CPU for the given index. */ - struct perf_event *events[ARMPMU_MAX_HWEVENTS]; + struct perf_event **events; /* * A 1 bit for an index indicates that the counter is being used for * an event. A 0 means that the counter can be used. */ - unsigned long used_mask[BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)]; + unsigned long *used_mask; /* * Hardware lock to serialize accesses to PMU registers. Needed for the @@ -56,6 +56,9 @@ struct cpu_hw_events { */ raw_spinlock_t pmu_lock; }; + +static DEFINE_PER_CPU(struct perf_event * [ARMPMU_MAX_HWEVENTS], hw_events); +static DEFINE_PER_CPU(unsigned long [BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)], used_mask); static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events); struct arm_pmu { @@ -714,6 +717,8 @@ static void __init cpu_pmu_init(struct arm_pmu *armpmu) int cpu; for_each_possible_cpu(cpu) { struct cpu_hw_events *events = &per_cpu(cpu_hw_events, cpu); + events->events = per_cpu(hw_events, cpu); + events->used_mask = per_cpu(used_mask, cpu); raw_spin_lock_init(&events->pmu_lock); } armpmu->get_hw_events = armpmu_get_cpu_events;