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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 <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Jamie Iles <jamie@jamieiles.com>
Reviewed-by: Ashwin Chaugule <ashwinc@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland 2011-04-27 16:22:21 +01:00 committed by Will Deacon
parent 48957155f8
commit 7b9f72c62e
1 changed files with 2 additions and 1 deletions
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3
arch/arm/kernel/perf_event.c
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@ -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;