From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9F47191F77; Tue, 14 Jan 2025 15:30:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736868609; cv=none; b=OG6Ns4qe1C43dZkUEjiYe6ZZLQRiX81ViPNREOLIb+Go1EDHyyVDXwydUCxa8N41sTgxHwtHKvYaUBt2TvEDTArk4Tor6WbivHwm5GwCr3JQ+qLdrvnlRiYfhqpOHpzuhqebnAPzqRXniWXvl6scEy9cKAEXksXbPLzOsgj+0B8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736868609; c=relaxed/simple; bh=EqcUylhusVYBo3Rb0QLFQ4ZNh6CRloFr970DPKRw/JY=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=iijCucltLKOf0S70tbCpm7hOeTSnEfOR2PBtXksLYmVW9iEYDVD4UrcpZrGcgTBhW+zSC96zFC35ZC8n5X2+e3CxYYxGhNDPINA1K1unC20jD+MBeYJavSC4y3SGVceXSc/N0fGvMaIRXxdWgmvgncRO6Izgaf8Vlqhn/eaRCrw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fVYIR/+F; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fVYIR/+F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30D92C4CEDD; Tue, 14 Jan 2025 15:30:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1736868608; bh=EqcUylhusVYBo3Rb0QLFQ4ZNh6CRloFr970DPKRw/JY=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=fVYIR/+FyZHGcYnlEoV4Cvfv0N64X43mfVFjqZUzPQ7ELaDwuDd8Gu7VAPx8aal9k qgr606MkMFthedEl5l4Ai1+Z0jjxwKR9CB/NxkRReR+yhOe3isVsHfAKuimisEGzIE vx3FuIS1oSK1oV5eBZyVXXo3S6YQaq3H1cOeixVZO4rRGLm3KOcub7JYaaK3PxnTrn xsEaSmiCLrguRRpcwDd2NNRxbtnGSIip9MD34i4MOEHbpwGcU0aRB57sHv3ehPA7vs UEp+7FxX5OX3/TIhu9+OJur+EIMZ1/QwkFTfh4Te3PbTyxsjmeud7+YOjc68knIbLr 5luT+B+B0CYBg== Message-ID: <4a90b17a-54ec-4ea3-a872-b0d79d9438e3@kernel.org> Date: Tue, 14 Jan 2025 16:30:00 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 14/14] of: Improve __of_add_property_sysfs() readability To: Zijun Hu Cc: Rob Herring , Saravana Kannan , Maxime Ripard , Robin Murphy , Grant Likely , Marc Zyngier , Andreas Herrmann , Marek Szyprowski , Catalin Marinas , Mike Rapoport , Oreoluwa Babatunde , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Zijun Hu References: <20250109-of_core_fix-v4-0-db8a72415b8c@quicinc.com> <20250109-of_core_fix-v4-14-db8a72415b8c@quicinc.com> <20250110204154.GA3529721-robh@kernel.org> <55a2e1cc-0a34-4599-8d62-a2479a0eac87@icloud.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 14/01/2025 16:20, Zijun Hu wrote: > On 2025/1/11 17:17, Krzysztof Kozlowski wrote: >>> const char security_prefix[] = "security-"; >>> use 'sizeof(security_prefix) - 1' for the length of string. >> Code is still not equivalent - just de-assemble it and you will see >> some overhead. >> >> Maybe just introduce builtin_strlen() to string.h and use such? It would >> be the pretty obvious code. > > strncmp(s1, "s2_string", builtin_strlen("s2_string")) is similar as > strncmp(s1, "s2_string", sizeof("s2_string") - 1). Above yes, but maybe builtin_strlen() could be made to work on the pointer, thus you would have "s2_string" in only one place. > > so perhaps, it is not worthy of a new builtin_strlen(). Best regards, Krzysztof