From patchwork Mon Apr 7 13:15:03 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zijun Hu X-Patchwork-Id: 14040516 Received: from pv50p00im-ztdg10021801.me.com (pv50p00im-ztdg10021801.me.com [17.58.6.56]) (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 E2B51253335 for ; Mon, 7 Apr 2025 13:15:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=17.58.6.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744031745; cv=none; b=B8KLj8dpks2ToehdBvwZaAXvjphEb9xwlSyZE5DozfF93YgaIhcL2JquAgCxvd6/3TcGKa1d7GwrrzAkV49e+JOtq4jclQuM60k9G/Aj5EgyIeSlFS4b6G4gqs/LXf2Zb1zkZEHVhDnYU1SitIt0HR/V2/pioB0aS7sMwVkvAeA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744031745; c=relaxed/simple; bh=OW8gauqUwQraOtuQFrdfsUbe4JWCtBprt5P/iZWxpwA=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=Ar3FdGa1abftbzv6Y5qNZP7eqH0+4sRkvCKH9BcFUyYhHGUFHfvOS6Zzk8c1xVkYTTldPMlIRr1qnPTqiU1Q73SyE56Xq1cXhHSqGMJGXcASZYffA0k4lwgD8BAzG7Dj9v81APkZjxdrPysuYmMCMgGVT+roe+kBfWTLgs2TYBc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com; spf=pass smtp.mailfrom=icloud.com; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b=voMvjcsj; arc=none smtp.client-ip=17.58.6.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=icloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=icloud.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=icloud.com header.i=@icloud.com header.b="voMvjcsj" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=icloud.com; s=1a1hai; bh=XylSqMaeGeWXWi2c3Gf5F7w2ZddGoC9yypIcq9xOZYY=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:x-icloud-hme; b=voMvjcsjeauRn7Xz4Eq4tXqcVu6EsHj8nYiXdvRvg3FTwGalHdk3Z4RYD0wNGLpQG 9smDn2DmBudwQPNoa9x0jPs6XGcMfdlHMAig6pgLmf41CN5WZAZhrj+VK+S3sdTchj 6mYR3h+j0YBVV+GfH3i1gTt8TpOwkAJAGc4diA1e1W/3Kw9sMNj8ND9l+T23yiuf1A 9X07qGjn+O/xlI2DnyFFghJQIzt+TbyhLl1Y1i1ySwKQeCgDEzLoBieXqf8RxjTllB xkYjaeAZr8MwBP0B31t2KDO1f65vWeaOcDiG84k+qDxM8ke/cI+vUt/ybOxLff50Bg XLZlM9ZGHz5IQ== Received: from [192.168.1.26] (pv50p00im-dlb-asmtp-mailmevip.me.com [17.56.9.10]) by pv50p00im-ztdg10021801.me.com (Postfix) with ESMTPSA id BD09A20103D7; Mon, 7 Apr 2025 13:15:36 +0000 (UTC) From: Zijun Hu Subject: [PATCH 0/2] lib/string: Improve performance for both strstarts() and str_has_prefix() Date: Mon, 07 Apr 2025 21:15:03 +0800 Message-Id: <20250407-imp_str_perf-v1-0-ed95d52964a4@quicinc.com> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIANfP82cC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDI1MDEwNz3czcgvjikqL4gtSiNF1DC+MUC8MUI3NjQ0MloJaCotS0zAqwcdG xtbUA0qOH9F4AAAA= X-Change-ID: 20250407-imp_str_perf-183d81d27311 To: Kees Cook , Andy Shevchenko , Andrew Morton Cc: Zijun Hu , linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, Zijun Hu , "Rob Herring (Arm)" X-Mailer: b4 0.14.2 X-Proofpoint-GUID: 18C5c_QP3sfwN-JJMCgYKri78N0o5OQc X-Proofpoint-ORIG-GUID: 18C5c_QP3sfwN-JJMCgYKri78N0o5OQc X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-07_04,2025-04-03_03,2024-11-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 malwarescore=0 spamscore=0 mlxlogscore=444 mlxscore=0 phishscore=0 clxscore=1011 suspectscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2308100000 definitions=main-2504070093 X-Apple-Remote-Links: v=1;h=KCk=;charset=UTF-8 Signed-off-by: Zijun Hu --- Zijun Hu (2): lib/string: Improve strstarts() performance lib/string: Improve str_has_prefix() performance include/linux/string.h | 31 ++-------------------------- lib/string.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 57 insertions(+), 29 deletions(-) --- base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8 change-id: 20250407-imp_str_perf-183d81d27311 Best regards,