linux-kernel - [tip: perf/core] arc/perf: Remove driver-specific throttle support

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Message-ID: <174782975583.406.14458305783798872837.tip-bot2@tip-bot2>
Date: Wed, 21 May 2025 12:15:55 -0000
From: "tip-bot2 for Kan Liang" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Kan Liang <kan.liang@...ux.intel.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Vineet Gupta <vgupta@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: perf/core] arc/perf: Remove driver-specific throttle support

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     a33d4d5325cce88ecea81c2468d85fa3fe720ab8
Gitweb:        https://git.kernel.org/tip/a33d4d5325cce88ecea81c2468d85fa3fe720ab8
Author:        Kan Liang <kan.liang@...ux.intel.com>
AuthorDate:    Tue, 20 May 2025 11:16:39 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 21 May 2025 13:57:45 +02:00

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@...ux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Vineet Gupta <vgupta@...nel.org>
Link: https://lore.kernel.org/r/20250520181644.2673067-12-kan.liang@linux.intel.com
---
 arch/arc/kernel/perf_event.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 6e5a651..ed6d4f0 100644
--- 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);