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GET /api/1.2/patches/2224665/?format=api
{ "id": 2224665, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2224665/?format=api", "web_url": "http://patchwork.ozlabs.org/project/rtc-linux/patch/20260417173621.368914-3-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": "<20260417173621.368914-3-ynorov@nvidia.com>", "list_archive_url": null, "date": "2026-04-17T17:36:13", "name": "[2/9] x86/extable: switch to using FIELD_GET_SIGNED()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "4750b328655b50a16fce98b84ccc2c4a603283e2", "submitter": { "id": 92516, "url": "http://patchwork.ozlabs.org/api/1.2/people/92516/?format=api", "name": "Yury Norov", "email": "ynorov@nvidia.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/rtc-linux/patch/20260417173621.368914-3-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/patches/2224665/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224665/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-rtc+bounces-6361-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=AGNn937F;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; 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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=VX2jkUAt9rHQ85ZED1KZkc4j2WmgNgcRxTLcGC7XQPQ=;\n b=AGNn937FKL/OEsECIyg6ZSFWIWY92r+XmV0PO1mM0L569aDHLOikuTtsniQ2Ppw0borKfe6rgeGV7v62rpYiL3UyyL+I1zy3ClcteJXo7cGMMxVjw5ExM+Q33ACuuJt26iG01vSX8a9ULVQyg7+xjYWKw6XmdN7xcPV24h8irvNK8hPjwN4N20Hr7Zi7hR6lID8w2ieGJHkPOTD5fBU8sGkZuZ/DyJ/7KNWd/IKCsqVD1+SuogSOQx0C4v7LMBZJbbafaMw0XnLvyRmFIiTwS7WNmms4Z71TFVlb87NXj822wOVnC3nNniSf1oYp2VtYDB4aYXeHWjUGu2xeDxe5Kg==", "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 2/9] x86/extable: switch to using FIELD_GET_SIGNED()", "Date": "Fri, 17 Apr 2026 13:36:13 -0400", "Message-ID": "<20260417173621.368914-3-ynorov@nvidia.com>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "<20260417173621.368914-1-ynorov@nvidia.com>", "References": "<20260417173621.368914-1-ynorov@nvidia.com>", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-ClientProxiedBy": "BN9PR03CA0627.namprd03.prod.outlook.com\n (2603:10b6:408:106::32) 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": "04ab7b3a-28b4-455e-cda7-08de9ca7db31", "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|22082099003;", "X-Microsoft-Antispam-Message-Info": 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", "X-OriginatorOrg": "Nvidia.com", "X-MS-Exchange-CrossTenant-Network-Message-Id": "\n 04ab7b3a-28b4-455e-cda7-08de9ca7db31", "X-MS-Exchange-CrossTenant-AuthSource": "CY8PR12MB8300.namprd12.prod.outlook.com", "X-MS-Exchange-CrossTenant-AuthAs": "Internal", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "17 Apr 2026 17:36:28.5627\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 wZQZzOs+b50p7HNT/YUb6i7AvX+go6b6XVSn5ACf1RgGnVPJIdEqwTOTRhiMHvxAjvmVALXiTedcfP0UuJV95w==", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "SA1PR12MB8744" }, "content": "The EX_DATA register is laid out such that EX_DATA_IMM occupied MSB.\nIt's done to make sure that FIELD_GET() will sign-extend the IMM\nfield during extraction.\n\nTo enforce that, all EX_DATA masks are made signed integers. This\nworks, but relies on the particular implementation of FIELD_GET(),\ni.e. masking then shifting, not vice versa; and the particular\nplacement of the fields in the register.\n\nSwitch to using the dedicated FIELD_GET_SIGNED(), and relax those\nlimitations.\n\nSigned-off-by: Yury Norov <ynorov@nvidia.com>\n---\n arch/x86/include/asm/extable_fixup_types.h | 13 ++++---------\n arch/x86/mm/extable.c | 2 +-\n 2 files changed, 5 insertions(+), 10 deletions(-)", "diff": "diff --git a/arch/x86/include/asm/extable_fixup_types.h b/arch/x86/include/asm/extable_fixup_types.h\nindex 906b0d5541e8..fd0cfb472103 100644\n--- a/arch/x86/include/asm/extable_fixup_types.h\n+++ b/arch/x86/include/asm/extable_fixup_types.h\n@@ -2,15 +2,10 @@\n #ifndef _ASM_X86_EXTABLE_FIXUP_TYPES_H\n #define _ASM_X86_EXTABLE_FIXUP_TYPES_H\n \n-/*\n- * Our IMM is signed, as such it must live at the top end of the word. Also,\n- * since C99 hex constants are of ambiguous type, force cast the mask to 'int'\n- * so that FIELD_GET() will DTRT and sign extend the value when it extracts it.\n- */\n-#define EX_DATA_TYPE_MASK\t\t((int)0x000000FF)\n-#define EX_DATA_REG_MASK\t\t((int)0x00000F00)\n-#define EX_DATA_FLAG_MASK\t\t((int)0x0000F000)\n-#define EX_DATA_IMM_MASK\t\t((int)0xFFFF0000)\n+#define EX_DATA_TYPE_MASK\t\t(0x000000FF)\n+#define EX_DATA_REG_MASK\t\t(0x00000F00)\n+#define EX_DATA_FLAG_MASK\t\t(0x0000F000)\n+#define EX_DATA_IMM_MASK\t\t(0xFFFF0000)\n \n #define EX_DATA_REG_SHIFT\t\t8\n #define EX_DATA_FLAG_SHIFT\t\t12\ndiff --git a/arch/x86/mm/extable.c b/arch/x86/mm/extable.c\nindex 6b9ff1c6cafa..ae663cf88a3c 100644\n--- a/arch/x86/mm/extable.c\n+++ b/arch/x86/mm/extable.c\n@@ -322,7 +322,7 @@ int fixup_exception(struct pt_regs *regs, int trapnr, unsigned long error_code,\n \n \ttype = FIELD_GET(EX_DATA_TYPE_MASK, e->data);\n \treg = FIELD_GET(EX_DATA_REG_MASK, e->data);\n-\timm = FIELD_GET(EX_DATA_IMM_MASK, e->data);\n+\timm = FIELD_GET_SIGNED(EX_DATA_IMM_MASK, e->data);\n \n \tswitch (type) {\n \tcase EX_TYPE_DEFAULT:\n", "prefixes": [ "2/9" ] }