Cover Letter Detail
Show a cover letter.
GET /api/1.2/covers/2224662/?format=api
{ "id": 2224662, "url": "http://patchwork.ozlabs.org/api/1.2/covers/2224662/?format=api", "web_url": "http://patchwork.ozlabs.org/project/rtc-linux/cover/20260417173621.368914-1-ynorov@nvidia.com/", "project": { "id": 9, "url": "http://patchwork.ozlabs.org/api/1.2/projects/9/?format=api", "name": "Linux RTC development", "link_name": "rtc-linux", "list_id": "linux-rtc.vger.kernel.org", "list_email": "linux-rtc@vger.kernel.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260417173621.368914-1-ynorov@nvidia.com>", "list_archive_url": null, "date": "2026-04-17T17:36:11", "name": "[0/9] bitfield: add FIELD_GET_SIGNED()", "submitter": { "id": 92516, "url": "http://patchwork.ozlabs.org/api/1.2/people/92516/?format=api", "name": "Yury Norov", "email": "ynorov@nvidia.com" }, "mbox": "http://patchwork.ozlabs.org/project/rtc-linux/cover/20260417173621.368914-1-ynorov@nvidia.com/mbox/", "series": [ { "id": 500382, "url": "http://patchwork.ozlabs.org/api/1.2/series/500382/?format=api", "web_url": "http://patchwork.ozlabs.org/project/rtc-linux/list/?series=500382", "date": "2026-04-17T17:36:11", "name": "bitfield: add FIELD_GET_SIGNED()", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500382/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2224662/comments/", "headers": { "Return-Path": "\n <linux-rtc+bounces-6359-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-rtc@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=Nvidia.com header.i=@Nvidia.com header.a=rsa-sha256\n header.s=selector2 header.b=rt/gaYxo;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=linux-rtc+bounces-6359-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com\n header.b=\"rt/gaYxo\"", "smtp.subspace.kernel.org;\n arc=fail smtp.client-ip=52.101.201.38", "smtp.subspace.kernel.org;\n dmarc=pass (p=reject dis=none) header.from=nvidia.com", "smtp.subspace.kernel.org;\n spf=fail smtp.mailfrom=nvidia.com", "dkim=none (message not signed)\n header.d=none;dmarc=none action=none header.from=nvidia.com;" ], "Received": [ "from sea.lore.kernel.org (sea.lore.kernel.org\n [IPv6:2600:3c0a:e001:db::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fy2BD3PQCz1yD3\n\tfor <incoming@patchwork.ozlabs.org>; Sat, 18 Apr 2026 03:36:52 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby sea.lore.kernel.org (Postfix) with ESMTP id 2535030179FA\n\tfor <incoming@patchwork.ozlabs.org>; Fri, 17 Apr 2026 17:36:35 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id A56ED396B8E;\n\tFri, 17 Apr 2026 17:36:33 +0000 (UTC)", "from PH7PR06CU001.outbound.protection.outlook.com\n (mail-westus3azon11010038.outbound.protection.outlook.com [52.101.201.38])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 1F19B3815ED;\n\tFri, 17 Apr 2026 17:36:28 +0000 (UTC)", "from CY8PR12MB8300.namprd12.prod.outlook.com (2603:10b6:930:7d::16)\n by SA1PR12MB8744.namprd12.prod.outlook.com (2603:10b6:806:38c::10) with\n Microsoft SMTP Server (version=TLS1_2,\n cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9818.21; Fri, 17 Apr\n 2026 17:36:24 +0000", "from CY8PR12MB8300.namprd12.prod.outlook.com\n ([fe80::ce75:8187:3ac3:c5de]) by CY8PR12MB8300.namprd12.prod.outlook.com\n ([fe80::ce75:8187:3ac3:c5de%3]) with mapi id 15.20.9818.023; Fri, 17 Apr 2026\n 17:36:24 +0000" ], "ARC-Seal": [ "i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776447393; cv=fail;\n b=Hl7bWopHclBn01owgjL1XLkGUBOjANLjJ8WGjnR8xba5xlINsUn+qEKz6Z7K7vfvGSUlQcmMFMEY+z+waFCDo++16Fg73UBaDBd8KsRnu9phTPA7aLFVNqJLK9x2hJvwGfi0JZ8UagMe8EP0VrdM5dae+IAEMXLrKeZpmaqD3sQ=", "i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none;\n b=EXwSDuCg1Tadswh/Z4jArsqAgAQGmWx7spMz+FFHUsMyMSoNIp/AAseqIXNBkqR6yc4EZDpR9+BJtMNxxDNSj5BQloDRRDmmGLzOsO81hzGOT+F7NS2RuG73LP48/YkpKr19Nk8Ar5+WDvGrYNCjN2EUuEDnDDjlkEum79J7Nn4AxJL5JJaQHK4p7vc1tR5/dX163UigineowklB5ltxGWZDgQVBwt40kgxYNaZztJEFyXc5AHoDfGl6K8NzWpDyIwTpjR1iUBzZ0GJDxMV0gv0MdREzAXkN1te3ncFgKsvcgb38RGZEdiwuPsLz2FxPQKHPgH9ZI1kyDDi/47Cckg==" ], "ARC-Message-Signature": [ "i=2; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776447393; c=relaxed/simple;\n\tbh=SqHfJhDGD1WqXDMlPR1xSHpj7qrf2TN9nD2mh1N6B7I=;\n\th=From:To:Cc:Subject:Date:Message-ID:Content-Type:MIME-Version;\n b=aGBH2YQR13RmHWNxsfK1xN39dJe/StPzWEFt1E1y/opjulHgMi2P0njUgml0w13SeQBGR2EmtR7kZ9CHwJ04bZvzpA6Sy1CQjHJkBPAp2WGsQYeKxlpr1zv79hnX3fmnHcRe16aCKM29wdiJdVYIPuKg/4oTbOO9OcrbbhUgb68=", "i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;\n s=arcselector10001;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1;\n bh=5mtZPGAcbPn3yYEX4G4NP+qTQrSh+h8BECbZbkUkcy8=;\n b=T1EjJCS4m/D/TXTv1tuS7V2MDGnFFRvAEWiZynPyyBWS2c1zqw63axVcSsuez1unqEjyX8pjhR2ctPeRCz/jIG+GeHNqMEwF7eMH8LrXn9Zh7dhCWmXuoCBwyl1nBEeCRFXE85X130FTumeA3z92JVrx/PTsLu+iha0FVh9p4mcyeMFBOu/Js1YTlwnEmtZ1RrSpUdLRt3XFrPFtKm+Xe+8XSPqKahbFmSypVU136iBZIlMne5t+laMzMCTLDNuTDhWuIME/fHdFpAcOBL3BooL7NinGhFc2W51XRI1n2Hun1GSRImAnFjySbmplnZdSa+nhrgZNzUA3Ka55w3Z/Rg==" ], "ARC-Authentication-Results": [ "i=2; smtp.subspace.kernel.org;\n dmarc=pass (p=reject dis=none) header.from=nvidia.com;\n spf=fail smtp.mailfrom=nvidia.com;\n dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com\n header.b=rt/gaYxo; arc=fail smtp.client-ip=52.101.201.38", "i=1; mx.microsoft.com 1; spf=pass\n smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com;\n dkim=pass header.d=nvidia.com; arc=none" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com;\n s=selector2;\n h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck;\n bh=5mtZPGAcbPn3yYEX4G4NP+qTQrSh+h8BECbZbkUkcy8=;\n b=rt/gaYxo/KgL4aYPJpVIC76Bi7KJgS2slgNuao4iDlrjz7FBjg4Zg5cYdxyUdaz1o172PII3iE5FrsB0nel1XJp88AuYJh0IvjT1SiFieYHpEZozW2G+K2QTuB0tyHX2Qc3hp7Qr/iDBvfESKpiwnsGFPW6oFkSOF3QPCdSD1jxEekIP/yX6eEPkgcyxcL4VMQdvk5J45v6RW1j2Muvtfec3hadTffyXaofJKZsu7LRbi04mlX8Nqd8WdAw+bna6ALkQDU1Ppq47J3i3fsdaYkYG0XwPUzBpvPrHOKGO3M5dBPHjNblb0/Q3RYBsOeDMw81xfBDos1AYGK74ERaOiw==", "From": "Yury Norov <ynorov@nvidia.com>", "To": "Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,\n Borislav Petkov <bp@alien8.de>, Dave Hansen <dave.hansen@linux.intel.com>,\n x86@kernel.org, \"H. Peter Anvin\" <hpa@zytor.com>,\n Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>,\n Jonathan Cameron <jic23@kernel.org>, David Lechner <dlechner@baylibre.com>,\n\t=?utf-8?q?Nuno_S=C3=A1?= <nuno.sa@analog.com>,\n Andy Shevchenko <andy@kernel.org>, Ping-Ke Shih <pkshih@realtek.com>,\n Richard Cochran <richardcochran@gmail.com>,\n Andrew Lunn <andrew+netdev@lunn.ch>, \"David S. Miller\" <davem@davemloft.net>,\n Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,\n Paolo Abeni <pabeni@redhat.com>,\n Alexandre Belloni <alexandre.belloni@bootlin.com>,\n Yury Norov <yury.norov@gmail.com>,\n Rasmus Villemoes <linux@rasmusvillemoes.dk>,\n Hans de Goede <hansg@kernel.org>, Linus Walleij <linusw@kernel.org>,\n Sakari Ailus <sakari.ailus@linux.intel.com>,\n Salah Triki <salah.triki@gmail.com>, Achim Gratz <Achim.Gratz@Stromeko.DE>,\n Ben Collins <bcollins@watter.com>, linux-kernel@vger.kernel.org,\n linux-iio@vger.kernel.org, linux-wireless@vger.kernel.org,\n netdev@vger.kernel.org, linux-rtc@vger.kernel.org", "Cc": "Yury Norov <ynorov@nvidia.com>", "Subject": "[PATCH 0/9] bitfield: add FIELD_GET_SIGNED()", "Date": "Fri, 17 Apr 2026 13:36:11 -0400", "Message-ID": "<20260417173621.368914-1-ynorov@nvidia.com>", "X-Mailer": "git-send-email 2.51.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "BN0PR04CA0131.namprd04.prod.outlook.com\n (2603:10b6:408:ed::16) To CY8PR12MB8300.namprd12.prod.outlook.com\n (2603:10b6:930:7d::16)", "Precedence": "bulk", "X-Mailing-List": "linux-rtc@vger.kernel.org", "List-Id": "<linux-rtc.vger.kernel.org>", "List-Subscribe": "<mailto:linux-rtc+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-rtc+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "X-MS-PublicTrafficType": "Email", "X-MS-TrafficTypeDiagnostic": "CY8PR12MB8300:EE_|SA1PR12MB8744:EE_", "X-MS-Office365-Filtering-Correlation-Id": "4d1a0c4c-0c52-452a-3e61-08de9ca7d8a4", "X-MS-Exchange-SenderADCheck": "1", "X-MS-Exchange-AntiSpam-Relay": "0", "X-Microsoft-Antispam": "\n\tBCL:0;ARA:13230040|10070799003|366016|1800799024|7416014|376014|921020|56012099003|18002099003;", "X-Microsoft-Antispam-Message-Info": "\n\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", "X-Forefront-Antispam-Report": "\n\tCIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CY8PR12MB8300.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(10070799003)(366016)(1800799024)(7416014)(376014)(921020)(56012099003)(18002099003);DIR:OUT;SFP:1101;", "X-MS-Exchange-AntiSpam-MessageData-ChunkCount": "1", "X-MS-Exchange-AntiSpam-MessageData-0": "\n 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", "X-OriginatorOrg": "Nvidia.com", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n 4d1a0c4c-0c52-452a-3e61-08de9ca7d8a4", "X-MS-Exchange-CrossTenant-AuthSource": "CY8PR12MB8300.namprd12.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "17 Apr 2026 17:36:24.2498\n (UTC)", "X-MS-Exchange-CrossTenant-FromEntityHeader": "Hosted", "X-MS-Exchange-CrossTenant-Id": "43083d15-7273-40c1-b7db-39efd9ccc17a", "X-MS-Exchange-CrossTenant-MailboxType": "HOSTED", "X-MS-Exchange-CrossTenant-UserPrincipalName": "\n WfEajuzT7WcIurnVln7XKgRWQg+b6zRxSY2oKhMKxPkytayPE0WwBeYY8XgcU5UjLtarsUDuSe3c7JQZNFIPzg==", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "SA1PR12MB8744" }, "content": "The bitfields are designed in assumption that fields contain unsigned\ninteger values, thus extracting the values from the field implies\nzero-extending.\n\nSome drivers need to sign-extend their fields, and currently do it like:\n\n\tdc_re += sign_extend32(FIELD_GET(0xfff000, tmp), 11);\n\tdc_im += sign_extend32(FIELD_GET(0xfff, tmp), 11);\n\nIt's error-prone because it relies on user to provide the correct\nindex of the most significant bit.\n\nThis series adds a signed version of FIELD_GET(), which is the more\nconvenient and compiles (on x86_64) to just a couple instructions:\nshl and sar.\n\nPatch #1 adds FIELD_GET_SIGNED(), and the rest of the series applies it\ntree-wide.\n\nYury Norov (9):\n bitfield: add FIELD_GET_SIGNED()\n x86/extable: switch to using FIELD_GET_SIGNED()\n iio: intel_dc_ti_adc: switch to using\n iio: magnetometer: yas530: switch to using FIELD_GET_SIGNED()\n iio: pressure: bmp280: switch to using\n iio: mcp9600: switch to using FIELD_GET_SIGNED()\n wifi: rtw89: switch to using FIELD_GET_SIGNED()\n rtc: rv3032: switch to using FIELD_GET_SIGNED()\n ptp: switch to using FIELD_GET_SIGNED()\n\n arch/x86/include/asm/extable_fixup_types.h | 13 ++++---------\n arch/x86/mm/extable.c | 2 +-\n drivers/iio/adc/intel_dc_ti_adc.c | 4 ++--\n drivers/iio/magnetometer/yamaha-yas530.c | 12 ++++++------\n drivers/iio/pressure/bmp280-core.c | 2 +-\n drivers/iio/temperature/mcp9600.c | 2 +-\n .../net/wireless/realtek/rtw89/rtw8852a_rfk.c | 4 ++--\n .../net/wireless/realtek/rtw89/rtw8852b_common.c | 4 ++--\n .../net/wireless/realtek/rtw89/rtw8852b_rfk.c | 4 ++--\n drivers/net/wireless/realtek/rtw89/rtw8852c.c | 4 ++--\n drivers/ptp/ptp_fc3.c | 4 ++--\n drivers/rtc/rtc-rv3032.c | 2 +-\n include/linux/bitfield.h | 16 ++++++++++++++++\n 13 files changed, 42 insertions(+), 31 deletions(-)" }