From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=205.220.180.131 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794220035; b=dULZcfRzWwmKKH9fvCkcBHwPTS7qQaEDlzukpxhx3CAqtO+ePgMoL2q57a5BgI6uQGYc Cci3cTksOaaSrSuPpSl7ijZIERAkTivxlixyKGkk0LS6zMUHCjApOITcWaqZ5ZUkvFZNX j2QW3pWNFnbF2QsVQlmFqr1ZB7Rkzywz8TZrsD3jcZe+DWGod2oK4+N/x1OzZo+K6WYf1 gGK8w6vK9XRNHT8CqPQ2kSbJabu5ri6fcVxBe6Ei4FJ/5LywmQoe3313ZYerSXw6lr86d 6DIOlh4FlsjaDz+mHvum/bABSCmsBSbyJFVL/TMJRP6m5DKq3fcmWzNx0BYWayubZOg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794220035; h=DMARC-Filter:Received:DKIM-Signature:Received:Received: DKIM-Signature:X-Google-DKIM-Signature:X-Forwarded-Encrypted: X-Gm-Message-State:X-Gm-Gg:X-Received:X-Received:Received:From:Date: Subject:MIME-Version:Content-Type:Content-Transfer-Encoding: Message-Id:References:In-Reply-To:To:Cc:X-Mailer: X-Developer-Signature:X-Developer-Key:X-Proofpoint-GUID: X-Proofpoint-Spam-Details-Enc:X-Proofpoint-ORIG-GUID: X-Proofpoint-Spam-Info:X-Authority-Analysis: X-Proofpoint-Virus-Version:X-Proofpoint-Spam-Details; bh=6VkGul/A8qLYHFVGluV9qcJV3TfbgVqP3JtUTvoLxT0=; b=ZzCwtC09aYtMTp3gRvnaoURrRSosJ+qByWyafeL6TaMsh16+armTQIGQgI/NwUfcf7co 3qQrGntGsfafkQf0s5UXW6qhkGq1gJ9j8fvEX12NZFMAqfVog3/8TI6OYOt/ta/pQTBwX KO3F8OOpqqWApFaQtrybtKmxCCnF7QHk0soUO+XiNDqH/8JonIMIdx9L0yxbpGXgnTPII lrZzbTL8GgnnNHRhxLdsX085sVICfpLfox74BaiXPQD5SfPjuG795Pr2b89Y6637xCMod tXm/i8JS6hmeP5oOgcedKV/slERpeH+vMB9ARY23JgJ7B0y3gJCZBMAlcx/ZURsoZyA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256 header.s=qcppdkim1 header.b=ddJ+Jhib; dkim=pass header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.a=rsa-sha256 header.s=google header.b=Hh0jLnjp; arc=none smtp.remote-ip=205.220.180.131 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 00509606D816 for ; Mon, 9 Nov 2026 10:27:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 00509606D816 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256 header.s=qcppdkim1 header.b=ddJ+Jhib; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.a=rsa-sha256 header.s=google header.b=Hh0jLnjp Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 6A99vGDA4108047 for ; Mon, 9 Nov 2026 10:27:14 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 6VkGul/A8qLYHFVGluV9qcJV3TfbgVqP3JtUTvoLxT0=; b=ddJ+JhibEptYfH2w tO93LiAUU9lC6xorTfIoNE0OzlX+4RiYzUwYeEpI3dyhx+wmt36jwV8RBo6Yu+QC cQPCvR0rg/MC7hYjHZ46gVG+SgByMUKO/9wYPx/hiZ5rDQNG1FZ+Hm853utRdq98 r9MPSP/c0CvUSFoN2qxv6PuhcilxumIWq0V4OtxXV5IEdPMl7DsYP/Mo8oHXA6lJ LR7QeoEqxQFHZrBk94XvvZn8oLH7DIS5/ROUS6oLOcZYO0pYdbPVzsuiV+CrISWx 4JQ/QjL8cFPPzkJCMESY2IncrDMUpdUqH3ySm15cf0C2UQgbwNNVlHDlEFDrxE2d C8NSZQ== Received: from mail-qk1-f197.google.com (mail-qk1-f197.google.com [209.85.222.197]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4hssbnxa4c-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Mon, 09 Nov 2026 10:27:13 +0000 (GMT) Received: by mail-qk1-f197.google.com with SMTP id af79cd13be357-93cb7f9bb86so139667285a.2 for ; Mon, 09 Nov 2026 02:27:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1794220033; x=1794824833; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=6VkGul/A8qLYHFVGluV9qcJV3TfbgVqP3JtUTvoLxT0=; b=Hh0jLnjpx9ou7olmCscQpn6ssfkhxC2ZK64KTcF/Md5BZEVEZ2/MHTKEB/wTfcM/VI 5RCuHSo5rNPiQIH3Ji0BrIwt1/R7YqSm3VWnb22IVofYVvZk8efXltjIIeb7DeeJZUCT JgGQi+flOZArQR4F7/NxEFIFQMmUZ8+QDq+3ScHgXyRqz6wiblhv18/577Obhczvig5B VyuTHk097HDTBBcX4KJdvFeeunGNvSj4qqO8v6norqvCJr6mkuE5gywsuo3bEYhl3woF 91zg+t6M95FkY93GX8ydjcxKHlf2NcVtWbWPhDJK6F1pv+zio7TxdU8qeiKlFhG5kIdJ 9LDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1794220033; x=1794824833; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :content-type:mime-version:subject:date:from:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=6VkGul/A8qLYHFVGluV9qcJV3TfbgVqP3JtUTvoLxT0=; b=RWHhK/RUfYtI/rIaPIQHHCFj8Km4DpeLbaaSfLAjj/ixzfrZOij+IyykJB5bUu8S5w 4E+Y3mg50zayKqmZ0EEO6jaEF+49AxzqV8pRVbk4zyjMZgrvi8K2qeLlrvfVSjWkdv0Y zqZF8baP5PzP+MkUTDGF/L/M6KzHWOpmWis8Ye6a/zEyr7pAQEyE4Up0tYdp7kgaajpf H6AOoIfMFIA2/wyqCwYA2mkqOfStrs9RHW/2VGkAOOmV4YhL7NN7S5cv77kMhWN0zfsZ XHvIecFaNSOHjYoKGAYuJxfM+c7l2kISbQA64RA6qIimrJQvaXHpCDipRbRwZ3vmTWEZ D/ew== X-Forwarded-Encrypted: i=1; AL+hErF6QNyfkKxsRUC3d6SrMcNPknrmF4OMAMKQxfg97VNv364RhTR7huhjsOJpvSKQap2AM+AUBZQcxSxxvA4=@vger.kernel.org X-Gm-Message-State: APuU4Z/l9UlVPe0fCxLEb/46BIyFd2srRshnALzjCvQdKVHELuKZif7Z P84A23BEwWyEAfzWpz3Jqkiu0H3h5gQ0Tm1+HMoxgz/9qCGFr11N9GNQ+0L1Val7znq7kuSkjTm Nt0Xy7zKIYasuFUawDziJVT9BtA7fX4Wfe7lWMkEDAgeESTpNUwiuzWHtwvR+ay43OK9j6mxCim M= X-Gm-Gg: AYBFou3zBMqfcCEkVc7SB6d3UP7H7K82OKDq9NXq0Gwd72QUIZH/oJNzSC/Lq7nq/Uq dYxUP8cunQ5L+GHnITWYCv120QFvAuKIU2Vdkcp6SA+LDSDiLRNwSn9HUX9RaJFO5dsEhr0Vjld 7NagxPFd44OFHasKiXYoqiSePE1Zi/6C4o/yg1mHnGWxchvLNcFFoI/We9JjFMSxAZqYY8V46+m PVYqgOXDZ3HlbRqko7ic2yXGwCDSECkdhxLcm4IPhML+lMsBtXVNleT+KbNYGV2CnWKlGrs/OJa Sa4mTkJpA5JGHPMMT9gl+OCU85DSpoleLfh174eC0YdRIPr2W4fPfWIzNpZvNnLanDgvvO4g6Be qOQis3swgM3Zhcg+PtoF7/bqvjLKzNm+3stsCqj15ugS1K6J+Wc1hFMI6G3KDsH+h8fH6CNeWPe MEGXHQjJUEuSoPucP4woV3ogDcUbJVC3Ekwcl/2o0WSw6r8seJlCFZtCUtLfdbEbw= X-Received: by 2002:a05:620a:2a08:b0:93f:565f:e40 with SMTP id af79cd13be357-9478476e63dmr532069385a.65.1794220033337; Mon, 09 Nov 2026 02:27:13 -0800 (PST) X-Received: by 2002:a05:620a:2a08:b0:93f:565f:e40 with SMTP id af79cd13be357-9478476e63dmr532066885a.65.1794220032851; Mon, 09 Nov 2026 02:27:12 -0800 (PST) Received: from brgl-qcom.local (2a01cb1d00dc7e0089167b9b97a26c96.ipv6.abo.wanadoo.fr. [2a01:cb1d:dc:7e00:8916:7b9b:97a2:6c96]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b7e32ad4d1sm237381545e9.5.2026.11.09.02.27.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2026 02:27:11 -0800 (PST) From: Bartosz Golaszewski Date: Mon, 09 Nov 2026 11:27:06 +0100 Subject: [PATCH v2 2/5] gpio: shared: use atomic set_bit() for descriptor flags X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261109-gpio-desc-flags-atomic-v2-2-c4c54b476628@oss.qualcomm.com> References: <20261109-gpio-desc-flags-atomic-v2-0-c4c54b476628@oss.qualcomm.com> In-Reply-To: <20261109-gpio-desc-flags-atomic-v2-0-c4c54b476628@oss.qualcomm.com> To: Linus Walleij , Bartosz Golaszewski , Andy Shevchenko , Kent Gibson , Adrian Ambrozewicz Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, Bartosz Golaszewski , stable@vger.kernel.org X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1518; i=bartosz.golaszewski@oss.qualcomm.com; h=from:subject:message-id; bh=sMmWnya14YIAq0vwSErMArXF2T6bT5ovzCJ95r5ENFU=; b=owEBbQKS/ZANAwAKAQWdLsv/NoTDAcsmYgBq8Z/79EFmR9l5XZlP3sbhJA42a4N7m/4Mg2WYT uXgHckUkUqJAjMEAAEKAB0WIQSR5RMt5bVGHXuiZfwFnS7L/zaEwwUCavGf+wAKCRAFnS7L/zaE wxfQEACg7P01dxIa3BoYJBiBN2CoMxns5UKycoYlNaX3cIvU1a6MvDTs/mafnFvHGm5XLdfsCjY o/uuqyaC3WeXDgjV7mxCH0wJfm6TyiK45GPjdXp3pi96WyIPlqEKb/Z8Ivmtrfmwlc3HsHub43p lND6r7vQkWV1yrZj1xD8aU65RTWB9utcTm5aTXFl3lw1mM9gQL7EX2a2YEtZWu6lCv96Zp0sGum ANqHWNiAtMIFi5b/QQUKNSke1WMlzmU81vswqUSRiG1pm0Vw19x0eoqCIEE07VWXl9LHzuZZFqr pWArCoK1ws9As+SLEFOGimmGYL8x5Oz9kyop8aGKTHqh7DkqZawzeesH77lxsxHr9oc8zV1XIVP iqJs6pHDBS+DjLQ0AVkpPPbALxMPdZvKf4dW9WQtBz3IpOKVgDc/R7RgSWa7E3UJ2umSabbgugW gLfO4vOj4tfr38M27DnIUaTCdpd2UEHlKZJmM3AseqDBOLFcm1CagxGkvF6b6iEI2s9axJ0GQcR sTYJYqU+y3HPqgbPdMvEPqMMQblcPxjCLrzCgFdYlhg4AEhDC7En3gy59aETUwoxDvXldfzPHEO 8f48pgNYWSRi+nHf2Glncp4Up4UlbFsyzGFoKaAiCBr7tH11as8b2r7SZbr6bekSCblQqanmi4i K/JiI0P201tFvZw== X-Developer-Key: i=bartosz.golaszewski@oss.qualcomm.com; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Proofpoint-GUID: COz55HvfWVAELzbieY8AbsK6NjWRd86r X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTA5MDA0MSBTYWx0ZWRfXyUOL61irL+N+ RKlq0yo4xskOWp9l+ou+1KKLVB6CUuyFlmy+MrSoQWfOA5mF6Vk5nsOT38XwFqIq1e80T7tPbaI NdeIyuUIt23oPpnOxnKBiBVSdWlV/yYo4NdJpQ3YMEg/AMuFXXnT7MVn8OVQHfsMq/KK1LBDd1A ygTUz6alHq8Bsg2PIay0IR/JDmhNUE7iuvLHWzlrhiqRf42RDhkHdaKJ2QAF1chyDSl83DPk5a+ 060eiI1hqbl74bvzpchlUOHRMNJMLel8UONCO6Ki9LdjhyhPg6dqqsdyZPAr1AhVX6BBXUTy6mV 0rnfdHcn6L+KSj1vQpt0BWsK5LsveFmD2qLCmiHkSHiIVPB+LoPGcNI1OMmfwmdxn3U4Ln8K3NR zBZq9KWr7UgTiO8QG7QZJ98XzDDRcHN8x7gPMugBXxGu2UKVD1Bk/HCJoDoAm1ATjzG5gOIBWTC N6iD9Ia6W4Q17j0NRYg== X-Proofpoint-ORIG-GUID: COz55HvfWVAELzbieY8AbsK6NjWRd86r X-Proofpoint-Spam-Info: AW1haW4tMjYxMTA5MDA0MSBTYWx0ZWRfX2HSkH3kA8qNE HjtrMANCunTpSixkOmaC7S55ty43UJrtVrYpqeG/XKxIhFMQXxPrSHXszwXSytJNYdqqb8C/fil opkjkPENNWMDIWGRFL9R+bkUQa0oQEw= X-Authority-Analysis: v=2.4 cv=JtBkP84C c=1 sm=1 tr=0 ts=6af1a001 cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=zJRp6_cAMcgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=H6RLajfuJ0QrpAsTGAkA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-09_04,2026-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 phishscore=0 adultscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611090041 Use the atomic set_bit() instead of __set_bit() on desc->flags so that every modification of the field uses atomic bitops. No functional change as these run before any line of the chip can be requested. Cc: stable@vger.kernel.org Fixes: eb374f764a70 ("gpio: provide gpiod_is_shared()") Fixes: 310a4a9cbb17 ("gpio: shared: shorten the critical section in gpiochip_setup_shared()") Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib-shared.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/gpio/gpiolib-shared.c b/drivers/gpio/gpiolib-shared.c index 8c9ac9d9330490b17fb3936b8758beb97a308a15..d94fb94f31c2f487d2e45924e11c33570466a0f1 100644 --- a/drivers/gpio/gpiolib-shared.c +++ b/drivers/gpio/gpiolib-shared.c @@ -532,8 +532,8 @@ int gpiochip_setup_shared(struct gpio_chip *gc) * This is a shared GPIO proxy. Mark its * descriptor as such and return here. */ - __set_bit(GPIOD_FLAG_SHARED_PROXY, - &gdev->descs[0].flags); + set_bit(GPIOD_FLAG_SHARED_PROXY, + &gdev->descs[0].flags); return 0; } } @@ -573,7 +573,7 @@ int gpiochip_setup_shared(struct gpio_chip *gc) desc = &gdev->descs[entry->offset]; - __set_bit(GPIOD_FLAG_SHARED, &desc->flags); + set_bit(GPIOD_FLAG_SHARED, &desc->flags); /* * Shared GPIOs are not requested via the normal path. Make * them inaccessible to anyone even before we register the -- 2.47.3