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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id EAD0DC433F5 for ; Tue, 11 Oct 2022 10:00:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 6618E6B0072; Tue, 11 Oct 2022 06:00:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 60F466B0073; Tue, 11 Oct 2022 06:00:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 462436B0074; Tue, 11 Oct 2022 06:00:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 342886B0072 for ; Tue, 11 Oct 2022 06:00:00 -0400 (EDT) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 0B35D80493 for ; Tue, 11 Oct 2022 10:00:00 +0000 (UTC) X-FDA: 80008222560.13.C99CB74 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf17.hostedemail.com (Postfix) with ESMTP id 688AA4001F for ; Tue, 11 Oct 2022 09:59:59 +0000 (UTC) Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 29B8C6Q8029887; Tue, 11 Oct 2022 09:59:51 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=8TskdJLbpvnFxRnfdNl/vSrXgO12T2EGmWRBhayoU1c=; b=MpaqjBwC+HaB5ger1fy963S2ffNRUt9sccx7dMemTiKvK2UOIsFlZ0JHT9Gs5IZ4zfml qY/jTzuNZjaUReCUjv42AnLRO4eNoxigZTG2dgSmPToOzMfNv0ToUI/BdkCxvcv0jZs4 KAfH+NcmCx1EoGONxvK9UIdFcnH037z7+M8Cge1O3Gm91hpPhIaVOR3E7UakX+Ns+D1J 9IgxsJVgqsn7p0lRiNFwySlGKoccp3FfMWW6q9jFe1uzvQm4VJu1RS/KoTRzH9juXZn8 p6aQXogukT8UVn5I1ksAPmVHXwNxLPpZf9k5ISCQwdeFnZJsEh1PK22RTy5wAg4rcNLf xg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3k510jh4kq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 11 Oct 2022 09:59:51 +0000 Received: from m0098410.ppops.net (m0098410.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 29B9qDas000691; Tue, 11 Oct 2022 09:59:50 GMT Received: from ppma04ams.nl.ibm.com (63.31.33a9.ip4.static.sl-reverse.com [169.51.49.99]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3k510jh4jg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 11 Oct 2022 09:59:49 +0000 Received: from pps.filterd (ppma04ams.nl.ibm.com [127.0.0.1]) by ppma04ams.nl.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 29B9otYM003872; Tue, 11 Oct 2022 09:59:46 GMT Received: from b06avi18878370.portsmouth.uk.ibm.com (b06avi18878370.portsmouth.uk.ibm.com [9.149.26.194]) by ppma04ams.nl.ibm.com with ESMTP id 3k30u9c3jg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 11 Oct 2022 09:59:46 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 29BA0ET842008878 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 11 Oct 2022 10:00:14 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 77311A4060; Tue, 11 Oct 2022 09:59:43 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 842F1A405B; Tue, 11 Oct 2022 09:59:41 +0000 (GMT) Received: from osiris (unknown [9.152.212.239]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 11 Oct 2022 09:59:41 +0000 (GMT) Date: Tue, 11 Oct 2022 11:59:41 +0200 From: Heiko Carstens To: "Jason A. Donenfeld" Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev, Andreas Noever , Andrew Morton , Andy Shevchenko , Borislav Petkov , Catalin Marinas , Christoph =?iso-8859-1?Q?B=F6hmwalder?= , Christoph Hellwig , Christophe Leroy , Daniel Borkmann , Dave Airlie , Dave Hansen , "David S . Miller" , Eric Dumazet , Florian Westphal , Greg Kroah-Hartman , "H . Peter Anvin" , Helge Deller , Herbert Xu , Huacai Chen , Hugh Dickins , Jakub Kicinski , "James E . J . Bottomley" , Jan Kara , Jason Gunthorpe , Jens Axboe , Johannes Berg , Jonathan Corbet , Jozsef Kadlecsik , KP Singh , Kees Cook , Marco Elver , Mauro Carvalho Chehab , Michael Ellerman , Pablo Neira Ayuso , Paolo Abeni , Peter Zijlstra , Richard Weinberger , Russell King , "Theodore Ts'o" , Thomas Bogendoerfer , Thomas Gleixner , Thomas Graf , Ulf Hansson , Vignesh Raghavendra , WANG Xuerui , Will Deacon , Yury Norov , dri-devel@lists.freedesktop.org, kasan-dev@googlegroups.com, kernel-janitors@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-crypto@vger.kernel.org, linux-doc@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-media@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-mmc@vger.kernel.org, linux-mtd@lists.infradead.org, linux-nvme@lists.infradead.org, linux-parisc@vger.kernel.org, linux-rdma@vger.kernel.org, linux-s390@vger.kernel.org, linux-um@lists.infradead.org, linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, sparclinux@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH v6 4/7] treewide: use get_random_{u8,u16}() when possible, part 2 Message-ID: References: <20221010230613.1076905-1-Jason@zx2c4.com> <20221010230613.1076905-5-Jason@zx2c4.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20221010230613.1076905-5-Jason@zx2c4.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: IT3Pw0mhIjHzqnHZZlCKJFwT-v1d8pz0 X-Proofpoint-GUID: Otg1b0ZLN3TnXHminz2qr4szScFjPSmT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-10-11_03,2022-10-10_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxscore=0 phishscore=0 impostorscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 clxscore=1015 mlxlogscore=473 spamscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2209130000 definitions=main-2210110053 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1665482399; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=8TskdJLbpvnFxRnfdNl/vSrXgO12T2EGmWRBhayoU1c=; b=ATaSzC4LXorKQeF2C24j2sHW87vyptf6Mw9Jq683zZTdlWe0oddHH8HjlJI4P71hRbM7uv cgsCbka98XM4OlmfzELobNy1gnVkj7NxZT9HGsX3Q8iSlIRBFWPPzsWo+yDfrnogFqFLyM eMnHYrnZ/maVC9K63H850ee0fECU46o= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=MpaqjBwC; spf=pass (imf17.hostedemail.com: domain of hca@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=hca@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1665482399; a=rsa-sha256; cv=none; b=RamEgWgMVPa1vM4kJtNWv58F7xIlSC4xM2oz3ZT5oGNLClyhwCl7qAppiuzCJyJDYshbRP YAl9//6Kz2J2Chyq7Ede44ZkEt9TL6paS2XOV/f72pEXm6dq6XcqBLdfMxE7oiblztG6zJ +xHTJPiZ9aPys9JubCPjClhwC8834Nk= Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=MpaqjBwC; spf=pass (imf17.hostedemail.com: domain of hca@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=hca@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: qu5dxn668xk4dpy5ykhyj5mwjb1tyego X-Rspamd-Queue-Id: 688AA4001F X-HE-Tag: 1665482399-699803 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Oct 10, 2022 at 05:06:10PM -0600, Jason A. Donenfeld wrote: > Rather than truncate a 32-bit value to a 16-bit value or an 8-bit value, > simply use the get_random_{u8,u16}() functions, which are faster than > wasting the additional bytes from a 32-bit value. This was done by hand, > identifying all of the places where one of the random integer functions > was used in a non-32-bit context. > > Reviewed-by: Greg Kroah-Hartman > Reviewed-by: Kees Cook > Reviewed-by: Yury Norov > Signed-off-by: Jason A. Donenfeld > --- > arch/s390/kernel/process.c | 2 +- For s390: Acked-by: Heiko Carstens