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 53594C7EE37 for ; Thu, 25 May 2023 16:37:32 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 58C0F6B0074; Thu, 25 May 2023 12:37:31 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 53BB7900003; Thu, 25 May 2023 12:37:31 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4035B900002; Thu, 25 May 2023 12:37:31 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 333286B0074 for ; Thu, 25 May 2023 12:37:31 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 0255AC0BDB for ; Thu, 25 May 2023 16:37:30 +0000 (UTC) X-FDA: 80829333102.10.E7F623A Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by imf26.hostedemail.com (Postfix) with ESMTP id 627CF14001C for ; Thu, 25 May 2023 16:37:28 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=none; spf=pass (imf26.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1685032648; 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; bh=9Y770x/OZWLb14XzTfiDAumPX8w2xqzdeRmCIiEi0cQ=; b=O3e7l/+WJFqFluUQA+QdGE5Nqm+07oy+JEKZMnFIpqw3mBRjHuvrwFTACPRRBDIds/fOOk IIqyZPjsfqpIG+OVzLMCY9/CMEHvSaH2gDpQHMB9PMy6raXHarPsgv+b2/zpdcPh1GtLIC EL5GUZ9tI/mraoW4JbLe+Hcfh4lLo+4= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=none; spf=pass (imf26.hostedemail.com: domain of cmarinas@kernel.org designates 139.178.84.217 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1685032648; a=rsa-sha256; cv=none; b=FxhadBJbiKLU17WRm9wUy5mqP1g3OwZPxtuvAkPa7QAdEBxzXLoo1CE6rhasDrJCTnI1ZM tP3mGLG3T40jR8n7hh68MJrrUB6V47k4qF7DJ9h3FvJzxCWXtQkkaZ8Px4Vx6zSDYykxWT oDUmCK9V4tlyXzTQ/f+Pt2IBZUzeRnE= Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 2329660B01; Thu, 25 May 2023 16:37:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD8E9C433EF; Thu, 25 May 2023 16:37:19 +0000 (UTC) Date: Thu, 25 May 2023 17:37:16 +0100 From: Catalin Marinas To: Hugh Dickins Cc: Andrew Morton , Mike Kravetz , Mike Rapoport , "Kirill A. Shutemov" , Matthew Wilcox , David Hildenbrand , Suren Baghdasaryan , Qi Zheng , Russell King , Will Deacon , Geert Uytterhoeven , Greg Ungerer , Michal Simek , Thomas Bogendoerfer , Helge Deller , John David Anglin , "Aneesh Kumar K.V" , Michael Ellerman , Alexandre Ghiti , Palmer Dabbelt , Heiko Carstens , Christian Borntraeger , Claudio Imbrenda , John Paul Adrian Glaubitz , "David S. Miller" , Chris Zankel , Max Filippov , x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 02/23] arm64: allow pte_offset_map() to fail Message-ID: References: <77a5d8c-406b-7068-4f17-23b7ac53bc83@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Queue-Id: 627CF14001C X-Rspam-User: X-Stat-Signature: o45i3bjjynt6a85ncodw758gnzkc4yhe X-Rspamd-Server: rspam01 X-HE-Tag: 1685032648-590433 X-HE-Meta: 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 1be5Xwpe 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 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 Tue, May 09, 2023 at 09:43:47PM -0700, Hugh Dickins wrote: > In rare transient cases, not yet made possible, pte_offset_map() and > pte_offset_map_lock() may not find a page table: handle appropriately. > > Signed-off-by: Hugh Dickins Acked-by: Catalin Marinas