[{"id":3683172,"web_url":"http://patchwork.ozlabs.org/comment/3683172/","msgid":"","list_archive_url":null,"date":"2026-04-28T07:10:22","subject":"Re: [PATCH v2 7/9] wifi: rtw89: switch to using FIELD_GET_SIGNED()","submitter":{"id":46495,"url":"http://patchwork.ozlabs.org/api/people/46495/","name":"Andy Shevchenko","email":"andriy.shevchenko@intel.com"},"content":"On Mon, Apr 27, 2026 at 05:41:24PM -0400, Yury Norov wrote:\n> Switch from sign_extend32(FIELD_GET()) to the dedicated\n> FIELD_GET_SIGNED() and don't calculate the fields length explicitly.\n\n...\n\n> \tfor (i = 0; i < ADDC_T_AVG; i++) {\n> \t\ttmp = rtw89_phy_read32_mask(rtwdev, R_DBG32_D, MASKDWORD);\n> -\t\tdc_re += sign_extend32(FIELD_GET(0xfff000, tmp), 11);\n> -\t\tdc_im += sign_extend32(FIELD_GET(0xfff, tmp), 11);\n> +\t\tdc_re += FIELD_GET_SIGNED(0xfff000, tmp);\n> +\t\tdc_im += FIELD_GET_SIGNED(0xfff, tmp);\n\nIn the same driver the GENMASK() is being used, why not doing it here while at it?\n\n> \t}\n\n...\n\n> \tfor (i = 0; i < ADDC_T_AVG; i++) {\n> \t\ttmp = rtw89_phy_read32_mask(rtwdev, R_DBG32_D, MASKDWORD);\n> -\t\tdc_re += sign_extend32(FIELD_GET(0xfff000, tmp), 11);\n> -\t\tdc_im += sign_extend32(FIELD_GET(0xfff, tmp), 11);\n> +\t\tdc_re += FIELD_GET_SIGNED(0xfff000, tmp);\n> +\t\tdc_im += FIELD_GET_SIGNED(0xfff, tmp);\n> \t}\n\nDitto, and it even looks like the same piece repeating twice in different\ncompilation units of the same driver...","headers":{"Return-Path":"\n ","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=intel.com header.i=@intel.com header.a=rsa-sha256\n header.s=Intel header.b=f4xJxPnq;\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-6444-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com\n header.b=\"f4xJxPnq\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=198.175.65.10","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=intel.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=intel.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)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g4WsR05TZz1xvV\n\tfor ; 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a=rsa-sha256; c=relaxed/simple;\n d=intel.com; i=@intel.com; q=dns/txt; s=Intel;\n t=1777360234; x=1808896234;\n h=date:from:to:cc:subject:message-id:references:\n mime-version:in-reply-to;\n bh=X/LMtGLsAI98KpSAX0nwBX/szOSGt8ghowDeNGWHy9w=;\n b=f4xJxPnqOOjTKIvaiPGB6pHrYvEWO4yXkcteqRVtUluMDxppSp5tOLnw\n 2KgsWY6UoBmYCQ19SSw98sw4t2du3B3KengqB71mRjM3HkdSQzjETJORk\n rOD6OYHl/elnjkgVwFeIg+9kO829Hx4l7O54aII3DLOWuPueIB4yaO0CW\n OcyA42McGjN9ma56K43zghu4ROXZ8MTRxnnuOxkbA4vZOxpmokMdkBdNF\n 9WjyeR4KpdorfbVgedEbJK4xE9gUzntvMbJqjodIG25ybtEXMgE5LhP1b\n H6n4W1wjghtluxi0TMKHZb04bfyk6IqXX9JpTK5EmUE/bN5e2pPaJzAGi\n g==;","X-CSE-ConnectionGUID":["CSbc6oE4T3KR5bp7jStLDQ==","lVSkmhXlQ/mFlOhxzX6tFQ=="],"X-CSE-MsgGUID":["WHDjQXjcTWaFMQZovvK4UA==","tuF8HfU7RNWOHPfANBcGjg=="],"X-IronPort-AV":["E=McAfee;i=\"6800,10657,11769\"; a=\"95674680\"","E=Sophos;i=\"6.23,203,1770624000\";\n d=\"scan'208\";a=\"95674680\"","E=Sophos;i=\"6.23,203,1770624000\";\n d=\"scan'208\";a=\"234150595\""],"X-ExtLoop1":"1","Date":"Tue, 28 Apr 2026 10:10:22 +0300","From":"Andy Shevchenko ","To":"Yury Norov ","Cc":"Thomas Gleixner , Ingo Molnar ,\n Borislav Petkov , Dave Hansen ,\n \"H. Peter Anvin\" , Andy Lutomirski ,\n Peter Zijlstra , Jonathan Cameron ,\n David Lechner ,\n Johannes Berg ,\n David Laight ,\n Nuno =?iso-8859-1?q?S=E1?= ,\n Andy Shevchenko , Ping-Ke Shih ,\n Richard Cochran ,\n Andrew Lunn , \"David S. Miller\" ,\n Eric Dumazet , Jakub Kicinski ,\n Paolo Abeni ,\n Alexandre Belloni ,\n Yury Norov ,\n Rasmus Villemoes ,\n Hans de Goede , Linus Walleij ,\n Sakari Ailus ,\n Salah Triki , Achim Gratz ,\n Ben Collins , x86@kernel.org,\n linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,\n linux-wireless@vger.kernel.org, netdev@vger.kernel.org,\n linux-rtc@vger.kernel.org","Subject":"Re: [PATCH v2 7/9] wifi: rtw89: switch to using FIELD_GET_SIGNED()","Message-ID":"","References":"<20260427214127.406067-1-ynorov@nvidia.com>\n <20260427214127.406067-8-ynorov@nvidia.com>","Precedence":"bulk","X-Mailing-List":"linux-rtc@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"<20260427214127.406067-8-ynorov@nvidia.com>","Organization":"Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6\n krs, Bertel Jungin Aukio 5, 02600 Espoo"}},{"id":3683383,"web_url":"http://patchwork.ozlabs.org/comment/3683383/","msgid":"<20260428114342.0d674fd8@pumpkin>","list_archive_url":null,"date":"2026-04-28T10:43:42","subject":"Re: [PATCH v2 7/9] wifi: rtw89: switch to using FIELD_GET_SIGNED()","submitter":{"id":89989,"url":"http://patchwork.ozlabs.org/api/people/89989/","name":"David Laight","email":"david.laight.linux@gmail.com"},"content":"On Tue, 28 Apr 2026 10:10:22 +0300\nAndy Shevchenko wrote:\n\n> On Mon, Apr 27, 2026 at 05:41:24PM -0400, Yury Norov wrote:\n> > Switch from sign_extend32(FIELD_GET()) to the dedicated\n> > FIELD_GET_SIGNED() and don't calculate the fields length explicitly. \n> \n> ...\n> \n> > \tfor (i = 0; i < ADDC_T_AVG; i++) {\n> > \t\ttmp = rtw89_phy_read32_mask(rtwdev, R_DBG32_D, MASKDWORD);\n> > -\t\tdc_re += sign_extend32(FIELD_GET(0xfff000, tmp), 11);\n> > -\t\tdc_im += sign_extend32(FIELD_GET(0xfff, tmp), 11);\n> > +\t\tdc_re += FIELD_GET_SIGNED(0xfff000, tmp);\n> > +\t\tdc_im += FIELD_GET_SIGNED(0xfff, tmp); \n> \n> In the same driver the GENMASK() is being used, why not doing it here while at it?\n\nTo me those bit masks look more readable than the GENMASK() calls would be.\n\n\tDavid\n\n> \n> > \t} \n> \n> ...\n> \n> > \tfor (i = 0; i < ADDC_T_AVG; i++) {\n> > \t\ttmp = rtw89_phy_read32_mask(rtwdev, R_DBG32_D, MASKDWORD);\n> > -\t\tdc_re += sign_extend32(FIELD_GET(0xfff000, tmp), 11);\n> > -\t\tdc_im += sign_extend32(FIELD_GET(0xfff, tmp), 11);\n> > +\t\tdc_re += FIELD_GET_SIGNED(0xfff000, tmp);\n> > +\t\tdc_im += FIELD_GET_SIGNED(0xfff, tmp);\n> > \t} \n> \n> Ditto, and it even looks like the same piece repeating twice in different\n> compilation units of the same driver...\n>","headers":{"Return-Path":"\n ","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=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=OnXstZmN;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; helo=tor.lore.kernel.org;\n envelope-from=linux-rtc+bounces-6449-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com\n header.b=\"OnXstZmN\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=209.85.128.43","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=gmail.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=gmail.com"],"Received":["from tor.lore.kernel.org (tor.lore.kernel.org\n [IPv6:2600:3c04:e001:36c::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g4d4b67SZz1yHv\n\tfor ; Tue, 28 Apr 2026 21:09:51 +1000 (AEST)","from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby tor.lore.kernel.org (Postfix) with ESMTP id D3654311366F\n\tfor ; Tue, 28 Apr 2026 10:56:50 +0000 (UTC)","from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 1F5F73F9F45;\n\tTue, 28 Apr 2026 10:43:48 +0000 (UTC)","from mail-wm1-f43.google.com (mail-wm1-f43.google.com\n [209.85.128.43])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 8CA3D3F9F36\n\tfor ; Tue, 28 Apr 2026 10:43:46 +0000 (UTC)","by mail-wm1-f43.google.com with SMTP id\n 5b1f17b1804b1-48a3e9862f0so60193075e9.1\n for ; Tue, 28 Apr 2026 03:43:46 -0700 (PDT)","from pumpkin (82-69-66-36.dsl.in-addr.zen.co.uk. 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Peter Anvin\" ,\n Andy Lutomirski , Peter Zijlstra ,\n Jonathan Cameron , David Lechner ,\n Johannes Berg ,\n Nuno =?utf-8?b?U8Oh?= ,\n Andy Shevchenko , Ping-Ke Shih ,\n Richard Cochran ,\n Andrew Lunn , \"David S. Miller\" ,\n Eric Dumazet , Jakub Kicinski ,\n Paolo Abeni ,\n Alexandre Belloni ,\n Yury Norov ,\n Rasmus Villemoes ,\n Hans de Goede , Linus Walleij ,\n Sakari Ailus ,\n Salah Triki , Achim Gratz ,\n Ben Collins , x86@kernel.org,\n linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,\n linux-wireless@vger.kernel.org, netdev@vger.kernel.org,\n linux-rtc@vger.kernel.org","Subject":"Re: [PATCH v2 7/9] wifi: rtw89: switch to using FIELD_GET_SIGNED()","Message-ID":"<20260428114342.0d674fd8@pumpkin>","In-Reply-To":"","References":"<20260427214127.406067-1-ynorov@nvidia.com>\n\t<20260427214127.406067-8-ynorov@nvidia.com>\n\t","X-Mailer":"Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf)","Precedence":"bulk","X-Mailing-List":"linux-rtc@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","MIME-Version":"1.0","Content-Type":"text/plain; charset=US-ASCII","Content-Transfer-Encoding":"7bit"}}]