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Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko , Ping-Ke Shih , Richard Cochran , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexandre Belloni , Yury Norov , Rasmus Villemoes , Hans de Goede , Linus Walleij , Sakari Ailus , Salah Triki , Achim Gratz , Ben Collins , linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-rtc@vger.kernel.org Cc: Yury Norov 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 (2603:10b6:408:ed::16) To CY8PR12MB8300.namprd12.prod.outlook.com (2603:10b6:930:7d::16) Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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: BCL:0;ARA:13230040|10070799003|366016|1800799024|7416014|376014|921020|56012099003|18002099003; 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Some drivers need to sign-extend their fields, and currently do it like: dc_re += sign_extend32(FIELD_GET(0xfff000, tmp), 11); dc_im += sign_extend32(FIELD_GET(0xfff, tmp), 11); It's error-prone because it relies on user to provide the correct index of the most significant bit. This series adds a signed version of FIELD_GET(), which is the more convenient and compiles (on x86_64) to just a couple instructions: shl and sar. Patch #1 adds FIELD_GET_SIGNED(), and the rest of the series applies it tree-wide. Yury Norov (9): bitfield: add FIELD_GET_SIGNED() x86/extable: switch to using FIELD_GET_SIGNED() iio: intel_dc_ti_adc: switch to using iio: magnetometer: yas530: switch to using FIELD_GET_SIGNED() iio: pressure: bmp280: switch to using iio: mcp9600: switch to using FIELD_GET_SIGNED() wifi: rtw89: switch to using FIELD_GET_SIGNED() rtc: rv3032: switch to using FIELD_GET_SIGNED() ptp: switch to using FIELD_GET_SIGNED() arch/x86/include/asm/extable_fixup_types.h | 13 ++++--------- arch/x86/mm/extable.c | 2 +- drivers/iio/adc/intel_dc_ti_adc.c | 4 ++-- drivers/iio/magnetometer/yamaha-yas530.c | 12 ++++++------ drivers/iio/pressure/bmp280-core.c | 2 +- drivers/iio/temperature/mcp9600.c | 2 +- .../net/wireless/realtek/rtw89/rtw8852a_rfk.c | 4 ++-- .../net/wireless/realtek/rtw89/rtw8852b_common.c | 4 ++-- .../net/wireless/realtek/rtw89/rtw8852b_rfk.c | 4 ++-- drivers/net/wireless/realtek/rtw89/rtw8852c.c | 4 ++-- drivers/ptp/ptp_fc3.c | 4 ++-- drivers/rtc/rtc-rv3032.c | 2 +- include/linux/bitfield.h | 16 ++++++++++++++++ 13 files changed, 42 insertions(+), 31 deletions(-) -- 2.51.0