From nobody Tue Dec 16 11:45:45 2025 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 5F7B8EE4993 for ; Wed, 23 Aug 2023 14:17:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235542AbjHWORB (ORCPT ); Wed, 23 Aug 2023 10:17:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60796 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235367AbjHWOQ6 (ORCPT ); Wed, 23 Aug 2023 10:16:58 -0400 Received: from mail-wm1-x335.google.com (mail-wm1-x335.google.com [IPv6:2a00:1450:4864:20::335]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 19149E57 for ; Wed, 23 Aug 2023 07:16:35 -0700 (PDT) Received: by mail-wm1-x335.google.com with SMTP id 5b1f17b1804b1-3fefe898f76so11021095e9.0 for ; Wed, 23 Aug 2023 07:16:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=9elements.com; s=google; t=1692800193; x=1693404993; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=IvNWPXN1vWWitgfBYrpmklA9FyR+CbytrP5PUl8B75w=; b=ZE4ZB6/j8h6er5vaMpbTofn3aBl7+DrwhgeiY5EDoWFgAjxk7c2PJAjtCr1oQI+VME Gjn5ZEWbtrOLbcu/efdDUmeFpGBkXd0TWOG9FwdULtAgYYoYSpOpPR9m2v4FfUxiiZF2 z1aSOyK+sJHIdz9fcCjQBanqtaRi/uz2f1czIRkQO70zWol+f952N2DBT1fPO37BvouK TiqL8O4VdZ58Sqn9ahePkAxQhD59iqwWb6H1aBZ9FP+ld0zf1YD9cyltWQ3Hv9oICJiM MP5cEif/VHuUqk9/UghrQvdkKh3njWHurl7Od5Ew09p5pyEGVaXbcqfZKSZ7JxP4ih2L bwuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692800193; x=1693404993; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=IvNWPXN1vWWitgfBYrpmklA9FyR+CbytrP5PUl8B75w=; b=f+93eEF+x+d5XzEW5OK7OkaQPdlzOkKLGTYt7t6w3OZF06kavby7f/vSX0gIM3mIW8 5tg1EzAbvpSFGVewm+Xvwslt1xowRe9GmLYAhcif/q0WqRv1acOgNG828KC5OFdFqiKw AeWD9y521IJhpBd4pe3rVR8//ZSQghYKOrGwB0G6LLqEkUH3TSE+E0loTsGJQlE352sp e3v8tBwuYH33XJ43zcVA9Bm3Q97NY7JGRN2ZbLb6sQBLUaJgEAiO+6Y/I1E3XTXRs0O7 nieHH3i/yE8+5hFCxhc2Dqd8YwKLHSqu6xzxXc50pIkR1eSPbtYhtoO2Yo0sIk2woEkL hyFg== X-Gm-Message-State: AOJu0Yyd2EBzsjsv0Jq2LEjHh/H/mnMAv5Inqea5Z3iyZfUNIvYgAlW5 csiAmufOOGi7qc6bmz3PDyrZVWerlQOv5uX1DIlC5g== X-Google-Smtp-Source: AGHT+IFiVKLoqxCoSUoLKsW95IcH8XTq1MRAEeK0UKnbG0ZSbC1ZuYZ95ap/qHhaE8o7qf+/oKRCow== X-Received: by 2002:a1c:4c17:0:b0:3fa:95c7:e891 with SMTP id z23-20020a1c4c17000000b003fa95c7e891mr9700579wmf.35.1692800193553; Wed, 23 Aug 2023 07:16:33 -0700 (PDT) Received: from stroh80.sec.9e.network (ip-078-094-000-051.um19.pools.vodafone-ip.de. [78.94.0.51]) by smtp.gmail.com with ESMTPSA id o17-20020a05600c379100b003fe26244858sm17749658wmr.46.2023.08.23.07.16.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Aug 2023 07:16:16 -0700 (PDT) From: Naresh Solanki X-Google-Original-From: Naresh Solanki To: Liam Girdwood , Mark Brown Cc: zev@bewilderbeest.net, Naresh Solanki , linux-kernel@vger.kernel.org Subject: [PATCH] regulator: userspace-consumer: Use atomic operation Date: Wed, 23 Aug 2023 16:15:57 +0200 Message-ID: <20230823141558.957526-1-Naresh.Solanki@9elements.com> X-Mailer: git-send-email 2.41.0 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" Replace mutexes with atomic operations. Signed-off-by: Naresh Solanki --- drivers/regulator/userspace-consumer.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/regulator/userspace-consumer.c b/drivers/regulator/use= rspace-consumer.c index a0b980022993..a86714bd32fd 100644 --- a/drivers/regulator/userspace-consumer.c +++ b/drivers/regulator/userspace-consumer.c @@ -32,7 +32,7 @@ struct userspace_consumer_data { =20 struct kobject *kobj; struct notifier_block nb; - unsigned long events; + atomic_long_t events; }; =20 static ssize_t name_show(struct device *dev, @@ -99,12 +99,7 @@ static ssize_t events_show(struct device *dev, struct device_attribute *attr, char *buf) { struct userspace_consumer_data *data =3D dev_get_drvdata(dev); - unsigned long e; - - mutex_lock(&events_lock); - e =3D data->events; - data->events =3D 0; - mutex_unlock(&events_lock); + unsigned long e =3D atomic_long_xchg(&data->events, 0); =20 return sprintf(buf, "0x%lx\n", e); } @@ -144,9 +139,7 @@ static int regulator_userspace_notify(struct notifier_b= lock *nb, struct userspace_consumer_data *data =3D container_of(nb, struct userspace_consumer_data, nb); =20 - mutex_lock(&events_lock); - data->events |=3D event; - mutex_unlock(&events_lock); + atomic_long_or(event, &data->events); =20 sysfs_notify(data->kobj, NULL, dev_attr_events.attr.name); =20 base-commit: 8950c4a350c188deb5f5b05df3244d4db82fe3d8 --=20 2.41.0