From: Mark Rutland Date: Wed, 27 Apr 2011 15:22:21 +0000 (+0100) Subject: ARM: perf: clean up event group validation X-Git-Tag: MMI-PSA29.97-13-9~18195^2~7^2^2~13 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7b9f72c62ed047a200b1ef8c70bee0b58e880af8;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git ARM: perf: clean up event group validation Currently, event group validation compares each event's 'pmu' pointer against the static 'pmu' pointer. This limits the code to supporting only 1 PMU. This patch changes the behaviour to consider an event's group leader's 'pmu' pointer as canonical for validation. This should ease later generalisation of the code to support multiple PMUs at once. 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 753648cf9af6..dfde9283aec1 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -348,8 +348,9 @@ validate_event(struct cpu_hw_events *cpuc, struct perf_event *event) { struct hw_perf_event fake_event = event->hw; + struct pmu *leader_pmu = event->group_leader->pmu; - if (event->pmu != &pmu || event->state <= PERF_EVENT_STATE_OFF) + if (event->pmu != leader_pmu || event->state <= PERF_EVENT_STATE_OFF) return 1; return armpmu->get_event_idx(cpuc, &fake_event) >= 0;