From patchwork Thu Mar 6 16:25:40 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuan-Wei Chiu X-Patchwork-Id: 14004879 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AC435C282DE for ; Thu, 6 Mar 2025 16:28:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 15E6610E751; Thu, 6 Mar 2025 16:28:31 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="DCS5f+y5"; dkim-atps=neutral Received: from mail-pj1-f47.google.com (mail-pj1-f47.google.com [209.85.216.47]) by gabe.freedesktop.org (Postfix) with ESMTPS id A283D10E751 for ; Thu, 6 Mar 2025 16:28:29 +0000 (UTC) Received: by mail-pj1-f47.google.com with SMTP id 98e67ed59e1d1-2f44353649aso1509216a91.0 for ; Thu, 06 Mar 2025 08:28:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1741278509; x=1741883309; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=rykqQnwPkGRFwR5KILLeuUxXhWjh1d/Lo2VO4W9LQtQ=; b=DCS5f+y5w4DB79FrvlOvfSHLF4AKMpisfTa7wQOl3uHUqQcOCJjmCLqyYj+zaP5bcn 0IVZyCS+qIi7tcHCsfgurUM7AKL2DGZCorMDYEKPImQC+Ayq419Ftsk5Dq+m5dfJJj2f 9va/FzyyuXZpFJi2t3t9MRkfd+G7tYRkuVQ9PBbANNGZwMn+jPObTR0j2Ihhtqv5xPJ3 MGk0b+kMBJ78Cd8v9AywSCpGP8jwKWUGpW99ZNuSTTvrqO5wVATdSwycKHKpdsvVtXog 6SNwA9pWeZcXRCbPFOwyZS/hxyFiCB/FHV8yeblToURXmJXQvAKwRGD2PyFDnmHmnsN3 vRSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741278509; x=1741883309; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=rykqQnwPkGRFwR5KILLeuUxXhWjh1d/Lo2VO4W9LQtQ=; b=JOMLIEHb4bKSxE2Six5N3lR+uxmlSq2uXZ5fBM+FWiVuViSZ5X6LK47bFX6VHKV/Vg gqmv6FuAP/bHIusjG7vclqluL+rBbSXtWFTwqiHehHU/XNleOkQDFU0CeCjTxBOD1AYr WY1oqUTxmfCK/MPWw5af11c6qOA3lHBD0C1hYLyRTDnz1kbKuoraL1PHx4tr3JNTdIZ6 GIw4AUoSp/lPTCc2Jpi3rKm3XDFsn97vrP/2krxkftFpe+JQoqOXVeqXYn5kfS75u3kT cgp3vkQ/v3CgA0dzS4+4ggNu1PCAsgbsHfHiqzlme8B4LfjG82jl/XEWgTNS450v7QKE ZNdA== X-Forwarded-Encrypted: i=1; AJvYcCXm0G6YuU6Z8pK4PobZTPILX/2zGZ/bpGFqqeW91f+D8BQz3o/zlEIG1dCiGEw3JWUVhGPMgYTOwY8=@lists.freedesktop.org X-Gm-Message-State: AOJu0YzUo7njfoAn7pGil0EY/chGcBXuEgi386ywQHS7V5o9eL75inGc O6iGdfqAASKPaTYiuwsWD5hYOCosTQPyDEBVJJQTKAHjYTnbP9fd X-Gm-Gg: ASbGncvGnG4Uvkr+c+Lr/nQ5gCOsErcTXi21j9IsFNgPvN1lJUdGkg0wq6d9nsjl9SY sNuAUFGdlDapfw1Rm65G3gqWuKhhddzm6HWwnMXujPHAwPqngMZYSvrulHyzJK9cSdZyLkITRUL ZwOu8Tnt4lUiWl47NhXBbl451L9jkSOBmjZw+cl5m1L+DmthwBx2Hdlcl+LYyTus/7S5Ob78R3b SIc9Mih6l7O/cA2LtyNHuj0BpXfcMI4RyuZUXaCoVkDP5l2jWKCNbIP3K2C6s0YENK7oVwbARDh 5VOwMyRUlMIH+C7mUsw2lGNhmvPBdoiBBsPBMRXr6uSOERkS8rQe9pGLx/plTJsDSlYxdXrupgI = X-Google-Smtp-Source: AGHT+IE7CMC10LMwovhBW4tB6jZafU5napSqaqhkL82rznmGKafZamE59+csgSshd0lW2KvQujLljw== X-Received: by 2002:a17:90b:568b:b0:2f9:c139:b61f with SMTP id 98e67ed59e1d1-2ff49728389mr14240353a91.14.1741278507670; Thu, 06 Mar 2025 08:28:27 -0800 (PST) Received: from visitorckw-System-Product-Name.. ([140.113.216.168]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2ff693e75bfsm1464298a91.33.2025.03.06.08.28.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Mar 2025 08:28:27 -0800 (PST) From: Kuan-Wei Chiu To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, jk@ozlabs.org, joel@jms.id.au, eajames@linux.ibm.com, andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, dmitry.torokhov@gmail.com, mchehab@kernel.org, awalls@md.metrocast.net, hverkuil@xs4all.nl, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, louis.peens@corigine.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, parthiban.veerasooran@microchip.com, arend.vanspriel@broadcom.com, johannes@sipsolutions.net, gregkh@linuxfoundation.org, jirislaby@kernel.org, yury.norov@gmail.com, akpm@linux-foundation.org Cc: hpa@zytor.com, alistair@popple.id.au, linux@rasmusvillemoes.dk, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-fsi@lists.ozlabs.org, dri-devel@lists.freedesktop.org, linux-input@vger.kernel.org, linux-media@vger.kernel.org, linux-mtd@lists.infradead.org, oss-drivers@corigine.com, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, linux-serial@vger.kernel.org, bpf@vger.kernel.org, jserv@ccns.ncku.edu.tw, Kuan-Wei Chiu , Yu-Chun Lin Subject: [PATCH v3 15/16] Input: joystick - Replace open-coded parity calculation with parity64() Date: Fri, 7 Mar 2025 00:25:40 +0800 Message-Id: <20250306162541.2633025-16-visitorckw@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250306162541.2633025-1-visitorckw@gmail.com> References: <20250306162541.2633025-1-visitorckw@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Refactor parity calculations to use the standard parity64() helper. This change eliminates redundant implementations and improves code efficiency. Co-developed-by: Yu-Chun Lin Signed-off-by: Yu-Chun Lin Signed-off-by: Kuan-Wei Chiu --- drivers/input/joystick/sidewinder.c | 24 +++++------------------- 1 file changed, 5 insertions(+), 19 deletions(-) diff --git a/drivers/input/joystick/sidewinder.c b/drivers/input/joystick/sidewinder.c index 3a5873e5fcb3..9fe980096f70 100644 --- a/drivers/input/joystick/sidewinder.c +++ b/drivers/input/joystick/sidewinder.c @@ -7,6 +7,7 @@ * Microsoft SideWinder joystick family driver for Linux */ +#include #include #include #include @@ -240,21 +241,6 @@ static void sw_init_digital(struct gameport *gameport) local_irq_restore(flags); } -/* - * sw_parity() computes parity of __u64 - */ - -static int sw_parity(__u64 t) -{ - int x = t ^ (t >> 32); - - x ^= x >> 16; - x ^= x >> 8; - x ^= x >> 4; - x ^= x >> 2; - x ^= x >> 1; - return x & 1; -} /* * sw_ccheck() checks synchronization bits and computes checksum of nibbles. @@ -316,7 +302,7 @@ static int sw_parse(unsigned char *buf, struct sw *sw) for (i = 0; i < sw->number; i ++) { - if (sw_parity(GB(i*15,15))) + if (parity64(GB(i*15,15))) return -1; input_report_abs(sw->dev[i], ABS_X, GB(i*15+3,1) - GB(i*15+2,1)); @@ -333,7 +319,7 @@ static int sw_parse(unsigned char *buf, struct sw *sw) case SW_ID_PP: case SW_ID_FFP: - if (!sw_parity(GB(0,48)) || (hat = GB(42,4)) > 8) + if (!parity64(GB(0,48)) || (hat = GB(42,4)) > 8) return -1; dev = sw->dev[0]; @@ -354,7 +340,7 @@ static int sw_parse(unsigned char *buf, struct sw *sw) case SW_ID_FSP: - if (!sw_parity(GB(0,43)) || (hat = GB(28,4)) > 8) + if (!parity64(GB(0,43)) || (hat = GB(28,4)) > 8) return -1; dev = sw->dev[0]; @@ -379,7 +365,7 @@ static int sw_parse(unsigned char *buf, struct sw *sw) case SW_ID_FFW: - if (!sw_parity(GB(0,33))) + if (!parity64(GB(0,33))) return -1; dev = sw->dev[0];