From nobody Wed Dec 17 15:34:33 2025 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D0A5D2356CE; Mon, 17 Mar 2025 10:34:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742207655; cv=none; b=ESb6/oM7W299z84OedJCO5PaQFFNEASRXU0kxVowFITVJxmgStovSx6G6wzVpESukiwhgKez0ol2Z/TLL6wuxGhkkTwACsnPXB+xM7SU/zoEHL5CSKGhdx8Sp1c5NOwBEXNK7iZbEH2rX0Sip/3+u4sGnX5sWIxJE6aNaR1F1M4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742207655; c=relaxed/simple; bh=HZShN4wlS7ms1Ft/uMt/q5h9b9+y/CEKi41ENckaZKs=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=GOknLOPaLcNWRioMyuTDsVTzeYCHWl7lWz9uQ5BWyXRL0A5QrpbAZxy1RowBGGfMx+6Ucp60hL1JYKou4nlExEv5qCgoAx+X7IwQykg/yrOEE6O3J5i6Qx4uQHWyF22zhOaNoNPg/ciDGN/mIae793zKDw8E2KpKOCvXwGsPzyc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=lshX1KW/; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=pq1c6Amt; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="lshX1KW/"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="pq1c6Amt" Date: Mon, 17 Mar 2025 10:34:11 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1742207652; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=E4XpulzWcwjcjbTJU9bdwjf2uibRkHORCrYvxbm3V/M=; b=lshX1KW/M2GGtcJ/Fcc19axJ9DJMcKp3FsMM1/GczjvGyOeA0ha9g6C52BRZAIu3wzvi9U RRJt6/sVuLHaMKQ4SRod/Bwhx+C007GMlEMNHJ7huvb+RHUDlpQts4Ge+hRtkkC0bPC9L+ Z08mhlZtX64uxkMVajscpY2SM/1uF3MFQVslGIvB3nliB5IrPXcVwlAqhECMC8Dur/Mb8+ dBdyyirvUwlZMoerlHPElteVVmTCnJTZpHYmzRO2v1yUdFNHBobIkHUva8NtkSaVPG5gL3 0IRMOsgy05hb5+R8BMReAV/RrRJcMu0EVRJtDr2wtAxkQQgKlV2qeoG+g7TxxA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1742207652; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=E4XpulzWcwjcjbTJU9bdwjf2uibRkHORCrYvxbm3V/M=; b=pq1c6AmtNCl1wnEzmHoipVMtOAGsSr0CpNJ+8sCcW2HPS1WdbHnl2IWUpzU8cYzITIJzu8 sLsMh7Si/VF33xCg== From: "tip-bot2 for Peter Zijlstra (Intel)" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: perf/core] locking/percpu-rwsem: Add guard support Cc: "Peter Zijlstra (Intel)" , Kan Liang , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20250314172700.438923-2-kan.liang@linux.intel.com> References: <20250314172700.438923-2-kan.liang@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <174220765152.14745.3454721970841815266.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the perf/core branch of tip: Commit-ID: fdfda868ee3b5da1fbdb7710b731e09d8dd3a615 Gitweb: https://git.kernel.org/tip/fdfda868ee3b5da1fbdb7710b731e09d8= dd3a615 Author: Peter Zijlstra (Intel) AuthorDate: Fri, 14 Mar 2025 10:26:55 -07:00 Committer: Peter Zijlstra CommitterDate: Mon, 17 Mar 2025 11:23:36 +01:00 locking/percpu-rwsem: Add guard support To simplify the usage of the percpu rw semaphore. Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Kan Liang Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20250314172700.438923-2-kan.liang@linux.int= el.com --- include/linux/percpu-rwsem.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index c012df3..af7d75e 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -8,6 +8,7 @@ #include #include #include +#include =20 struct percpu_rw_semaphore { struct rcu_sync rss; @@ -125,6 +126,13 @@ extern bool percpu_is_read_locked(struct percpu_rw_sem= aphore *); extern void percpu_down_write(struct percpu_rw_semaphore *); extern void percpu_up_write(struct percpu_rw_semaphore *); =20 +DEFINE_GUARD(percpu_read, struct percpu_rw_semaphore *, + percpu_down_read(_T), percpu_up_read(_T)) +DEFINE_GUARD_COND(percpu_read, _try, percpu_down_read_trylock(_T)) + +DEFINE_GUARD(percpu_write, struct percpu_rw_semaphore *, + percpu_down_write(_T), percpu_up_write(_T)) + static inline bool percpu_is_write_locked(struct percpu_rw_semaphore *sem) { return atomic_read(&sem->block);