From mboxrd@z Thu Jan 1 00:00:00 1970 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 D9E3BC28B23 for ; Fri, 7 Mar 2025 11:43:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 41E0B10E133; Fri, 7 Mar 2025 11:43:00 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="cpj34aCT"; dkim-atps=neutral Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by gabe.freedesktop.org (Postfix) with ESMTPS id BE03610E133 for ; Fri, 7 Mar 2025 11:42:58 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id AFE3C5C20F4; Fri, 7 Mar 2025 11:40:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6038BC4CED1; Fri, 7 Mar 2025 11:42:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741347774; bh=H/SrTjRnssQjPOOBykePVbYa7ahHTCTrRBL2xnXgmvY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=cpj34aCTqXWP5rQZurpGY0couj+4e0eT6PhpquXc+a21r7Wds04FQWkwPu43bkkvC EHbP7rEbNCz5f7/7FTThMQ1UzIGQDuQfJa9IYMPYNzQNlPfFu6zD5q/X6BPwtlx1GT iUcgkdu94klL6I3RvI1W5Ddzm8ixwSsVRtNAeopeY6bMfE3nIDg0gcZ1OXUTod1a4I udmAw6p3K2cKwQbwlG7aDHHIti7tdUWXiSDNHM5Pe15h2OzYvzkou0BbNcwPAh1ubB J7vgpZ41BbnLAzGn/VkN++Yym7ckAfwoEIfePjdOyVkzgE3a8Nm+kyEx8wsx5tVGGO 9rdDt3COcdHOQ== Message-ID: Date: Fri, 7 Mar 2025 12:42:41 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 01/16] bitops: Change parity8() return type to bool To: Ingo Molnar Cc: Kuan-Wei Chiu , 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, yury.norov@gmail.com, akpm@linux-foundation.org, 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, Yu-Chun Lin References: <20250306162541.2633025-1-visitorckw@gmail.com> <20250306162541.2633025-2-visitorckw@gmail.com> <9d4b77da-18c5-4551-ae94-a2b9fe78489a@kernel.org> Content-Language: en-US From: Jiri Slaby Autocrypt: addr=jirislaby@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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" On 07. 03. 25, 12:38, Ingo Molnar wrote: > > * Jiri Slaby wrote: > >> On 06. 03. 25, 17:25, Kuan-Wei Chiu wrote: >>> Change return type to bool for better clarity. Update the kernel doc >>> comment accordingly, including fixing "@value" to "@val" and adjusting >>> examples. Also mark the function with __attribute_const__ to allow >>> potential compiler optimizations. >>> >>> Co-developed-by: Yu-Chun Lin >>> Signed-off-by: Yu-Chun Lin >>> Signed-off-by: Kuan-Wei Chiu >>> --- >>> include/linux/bitops.h | 10 +++++----- >>> 1 file changed, 5 insertions(+), 5 deletions(-) >>> >>> diff --git a/include/linux/bitops.h b/include/linux/bitops.h >>> index c1cb53cf2f0f..44e5765b8bec 100644 >>> --- a/include/linux/bitops.h >>> +++ b/include/linux/bitops.h >>> @@ -231,26 +231,26 @@ static inline int get_count_order_long(unsigned long l) >>> /** >>> * parity8 - get the parity of an u8 value >>> - * @value: the value to be examined >>> + * @val: the value to be examined >>> * >>> * Determine the parity of the u8 argument. >>> * >>> * Returns: >>> - * 0 for even parity, 1 for odd parity >>> + * false for even parity, true for odd parity >> >> This occurs somehow inverted to me. When something is in parity means that >> it has equal number of 1s and 0s. I.e. return true for even distribution. >> Dunno what others think? Or perhaps this should be dubbed odd_parity() when >> bool is returned? Then you'd return true for odd. > > OTOH: > > - '0' is an even number and is returned for even parity, > - '1' is an odd number and is returned for odd parity. Yes, that used to make sense for me. For bool/true/false, it no longer does. But as I wrote, it might be only me... thanks, -- js suse labs