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

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Message-ID: <174782975303.406.8766309661681342115.tip-bot2@tip-bot2>
Date: Wed, 21 May 2025 12:15:53 -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>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: perf/core] sparc/perf: Remove driver-specific throttle support

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

Commit-ID:     e4806c17bfd5d6f4363557854cbace786311d527
Gitweb:        https://git.kernel.org/tip/e4806c17bfd5d6f4363557854cbace786311d527
Author:        Kan Liang <kan.liang@...ux.intel.com>
AuthorDate:    Tue, 20 May 2025 11:16:42 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Wed, 21 May 2025 13:57:46 +02:00

sparc/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>
Link: https://lore.kernel.org/r/20250520181644.2673067-15-kan.liang@linux.intel.com
---
 arch/sparc/kernel/perf_event.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index f02a283..cae4d33 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1668,8 +1668,7 @@ static int __kprobes perf_event_nmi_handler(struct notifier_block *self,
 		if (!sparc_perf_event_set_period(event, hwc, idx))
 			continue;
 
-		if (perf_event_overflow(event, &data, regs))
-			sparc_pmu_stop(event, 0);
+		perf_event_overflow(event, &data, regs);
 	}
 
 	finish_clock = sched_clock();