From nobody Fri Jan 2 06:00:41 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 407ADCDB465 for ; Mon, 16 Oct 2023 05:25:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231624AbjJPFZB (ORCPT ); Mon, 16 Oct 2023 01:25:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54558 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230442AbjJPFYt (ORCPT ); Mon, 16 Oct 2023 01:24:49 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 9E493F3; Sun, 15 Oct 2023 22:24:47 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id EA122DA7; Sun, 15 Oct 2023 22:25:27 -0700 (PDT) Received: from a077893.blr.arm.com (a077893.blr.arm.com [10.162.41.8]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id E53193F762; Sun, 15 Oct 2023 22:24:44 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Cc: Anshuman Khandual , Mark Rutland , Will Deacon , Russell King , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC 2/2] drivers: perf: arm_pmu: Drop 'pmu_lock' element from 'struct pmu_hw_events' Date: Mon, 16 Oct 2023 10:54:31 +0530 Message-Id: <20231016052431.1390269-3-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231016052431.1390269-1-anshuman.khandual@arm.com> References: <20231016052431.1390269-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" As 'pmu_lock' element is not being used in any ARM PMU implementation, just drop this from 'struct pmu_hw_events'. Cc: Will Deacon Cc: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- drivers/perf/arm_pmu.c | 1 - include/linux/perf/arm_pmu.h | 6 ------ 2 files changed, 7 deletions(-) diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index d712a19e47ac..379479b50bdd 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -893,7 +893,6 @@ struct arm_pmu *armpmu_alloc(void) struct pmu_hw_events *events; =20 events =3D per_cpu_ptr(pmu->hw_events, cpu); - raw_spin_lock_init(&events->pmu_lock); events->percpu_pmu =3D pmu; } =20 diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h index 143fbc10ecfe..e2503d48ddee 100644 --- a/include/linux/perf/arm_pmu.h +++ b/include/linux/perf/arm_pmu.h @@ -59,12 +59,6 @@ struct pmu_hw_events { */ DECLARE_BITMAP(used_mask, ARMPMU_MAX_HWEVENTS); =20 - /* - * Hardware lock to serialize accesses to PMU registers. Needed for the - * read/modify/write sequences. - */ - raw_spinlock_t pmu_lock; - /* * When using percpu IRQs, we need a percpu dev_id. Place it here as we * already have to allocate this struct per cpu. --=20 2.25.1