From patchwork Tue Jul 25 12:08:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 706492 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 E7311C04E69 for ; Tue, 25 Jul 2023 12:25:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233556AbjGYMZj (ORCPT ); Tue, 25 Jul 2023 08:25:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230424AbjGYMZe (ORCPT ); Tue, 25 Jul 2023 08:25:34 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C181E7E; Tue, 25 Jul 2023 05:25:32 -0700 (PDT) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.2.0) id a9f50b1ffa9a852c; Tue, 25 Jul 2023 14:25:31 +0200 Received: from kreacher.localnet (unknown [195.136.19.94]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id BD62E661B0F; Tue, 25 Jul 2023 14:25:30 +0200 (CEST) From: "Rafael J. Wysocki" To: Linux ACPI Cc: LKML , Linux PM , Michal Wilczynski , Zhang Rui , Srinivas Pandruvada , Daniel Lezcano Subject: [PATCH v3 3/8] thermal: core: Add routines for locking and unlocking thermal zones Date: Tue, 25 Jul 2023 14:08:02 +0200 Message-ID: <2154273.irdbgypaU6@kreacher> In-Reply-To: <12254967.O9o76ZdvQC@kreacher> References: <13318886.uLZWGnKmhe@kreacher> <12254967.O9o76ZdvQC@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 195.136.19.94 X-CLIENT-HOSTNAME: 195.136.19.94 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedviedriedtgdehtdcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfjqffogffrnfdpggftiffpkfenuceurghilhhouhhtmecuudehtdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkjghfggfgtgesthfuredttddtjeenucfhrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqeenucggtffrrghtthgvrhhnpedvffeuiedtgfdvtddugeeujedtffetteegfeekffdvfedttddtuefhgeefvdejhfenucfkphepudelhedrudefiedrudelrdelgeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeduleehrddufeeirdduledrleegpdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqpdhnsggprhgtphhtthhopeejpdhrtghpthhtoheplhhinhhugidqrggtphhisehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqphhmsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepmhhitghhrghlrdifihhltgiihihnshhkihesihhnthgvlhdrtghomhdprhgt phhtthhopehruhhirdiihhgrnhhgsehinhhtvghlrdgtohhmpdhrtghpthhtohepshhrihhnihhvrghsrdhprghnughruhhvrggurgeslhhinhhugidrihhnthgvlhdrtghomh X-DCC--Metrics: v370.home.net.pl 1024; Body=7 Fuz1=7 Fuz2=7 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Rafael J. Wysocki Add thermal_zone_device_lock() and thermal_zone_device_unlock() for acquiring and releasing the thermal zone lock, respectively. They will be used by the ACPI thermal driver to protect trip point temperature updates against races with accesses from elsewhere. Signed-off-by: Rafael J. Wysocki --- v2 -> v3: No changes. v1 -> v2: New patch. --- drivers/thermal/thermal_core.c | 13 +++++++++++++ include/linux/thermal.h | 2 ++ 2 files changed, 15 insertions(+) Index: linux-pm/drivers/thermal/thermal_core.c =================================================================== --- linux-pm.orig/drivers/thermal/thermal_core.c +++ linux-pm/drivers/thermal/thermal_core.c @@ -497,6 +498,18 @@ void thermal_zone_device_update(struct t } EXPORT_SYMBOL_GPL(thermal_zone_device_update); +void thermal_zone_device_lock(struct thermal_zone_device *tz) +{ + mutex_lock(&tz->lock); +} +EXPORT_SYMBOL_GPL(thermal_zone_device_lock); + +void thermal_zone_device_unlock(struct thermal_zone_device *tz) +{ + mutex_unlock(&tz->lock); +} +EXPORT_SYMBOL_GPL(thermal_zone_device_unlock); + static void thermal_zone_device_check(struct work_struct *work) { struct thermal_zone_device *tz = container_of(work, struct Index: linux-pm/include/linux/thermal.h =================================================================== --- linux-pm.orig/include/linux/thermal.h +++ linux-pm/include/linux/thermal.h @@ -336,6 +336,8 @@ int thermal_zone_unbind_cooling_device(s struct thermal_cooling_device *); void thermal_zone_device_update(struct thermal_zone_device *, enum thermal_notify_event); +void thermal_zone_device_lock(struct thermal_zone_device *tz); +void thermal_zone_device_unlock(struct thermal_zone_device *tz); struct thermal_cooling_device *thermal_cooling_device_register(const char *, void *, const struct thermal_cooling_device_ops *);