arc/perf: Remove driver-specific throttle support

The throttle support has been added in the generic code. Remove
the driver-specific throttle support.

Besides the throttle, perf_event_overflow may return true because of
event_limit. It already does an inatomic event disable. The pmu->stop
is not required either.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Vineet Gupta <vgupta@kernel.org>
Link: https://lore.kernel.org/r/20250520181644.2673067-12-kan.liang@linux.intel.com

diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 6e5a651cd75cf5403001dc73c13717d0b53ffe13..ed6d4f0cd6216277e02094fecdcc4f32899dda77 100644 (file)
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -599,10 +599,8 @@ static irqreturn_t arc_pmu_intr(int irq, void *dev)
 
                arc_perf_event_update(event, &event->hw, event->hw.idx);
                perf_sample_data_init(&data, 0, hwc->last_period);
-               if (arc_pmu_event_set_period(event)) {
-                       if (perf_event_overflow(event, &data, regs))
-                               arc_pmu_stop(event, 0);
-               }
+               if (arc_pmu_event_set_period(event))
+                       perf_event_overflow(event, &data, regs);
 
                active_ints &= ~BIT(idx);
        } while (active_ints);