From patchwork Fri Nov 8 10:32:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 11234525 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 80EAC13BD for ; Fri, 8 Nov 2019 10:32:45 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5EC7721848 for ; Fri, 8 Nov 2019 10:32:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="kMYX91Us"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="VHgT/2En" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5EC7721848 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Subject:To:From :Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=iFv/oLYlRYEenVAatlJx46QfLhYsFd+nZN21LeVxSWI=; b=kMYX91Us3F8W6L K5UF8jTFuJ0jlJVYPxoLL09T0kL/4J6YTFDs83h/sntH7lrkpfJrydLTbnrnLekCRLCzhqZBIljko WySFLgjCZYKhJV//7Pr7h4Ow69V0Vkox9DBaIrFMjfRAWCjteUEUcCWyvwgrcF3kBeqSTwEcvvBW+ IEEzNLU7Uf1kdqps4OLQC89e4b0ZNcUlJFW3oo8ftrKuZ5Ic9G0t3+zjwZmH8ELla5X12VUGa4u6M Rqr/R1aRgSI/hXFBbZ5NyrJioBH2X6oszZCio+jEnaSa/GYxOW44tUz1zDRUs2v40Pzr+e8rN6eCO XsEjKk8R/Mm0IcUqi6cA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iT1ZH-0001VK-Be; Fri, 08 Nov 2019 10:32:39 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iT1ZE-0001Us-PF for linux-arm-kernel@lists.infradead.org; Fri, 08 Nov 2019 10:32:38 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2560221848; Fri, 8 Nov 2019 10:32:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573209156; bh=Zrz2muJg2Wi+GRQmY5YrG97htwFJeAI4OLuBB+7I9q8=; h=Date:From:To:Cc:Subject:From; b=VHgT/2EnB2SWziDwi5HEB34jb3w3+2Aq7SjBroebo0+uAw9zbBJ03g96pSSzC9sFK /c8qvBba/M45Qc4t7Kq1b6JhqeNY6yYVApR+hUWyCyKpWSqZFTjiXpx+2Yl5xdN5xn dQymNY83aVUX4OcEePulA5Y9b8AGI+V3S2HzOWSo= Date: Fri, 8 Nov 2019 10:32:31 +0000 From: Will Deacon To: torvalds@linux-foundation.org Subject: [GIT PULL] arm64: Fix for -rc7 Message-ID: <20191108103231.GA19153@willie-the-truck> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191108_023236_842530_E7FD3D4F X-CRM114-Status: GOOD ( 10.96 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: catalin.marinas@arm.com, Linux Kernel Mailing List , Linux ARM Kernel Mailing List Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Hi Linus, Please pull this single arm64 fix for -rc7. It's a revert of 747a70e60b72 ("arm64: Fix copy-on-write referencing in HugeTLB"), not because that patch was wrong, but because it was broken by aa57157be69f ("arm64: Ensure VM_WRITE|VM_SHARED ptes are clean by default") which we merged in -rc6. We spotted the issue in Android (AOSP), where one of the JIT threads gets stuck on a write fault during boot because the faulting pte is marked as PTE_DIRTY | PTE_WRITE | PTE_RDONLY and the fault handler decides that there's nothing to do thanks to pte_same() masking out PTE_RDONLY. Thanks to John Stultz for reporting this and testing this so quickly, and to Steve Capper for confirming that the HugeTLB tests continue to pass. Cheers, Will --->8 The following changes since commit 1cf45b8fdbb87040e1d1bd793891089f4678aa41: arm64: apply ARM64_ERRATUM_843419 workaround for Brahma-B53 core (2019-11-01 10:47:37 +0000) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git tags/arm64-fixes for you to fetch changes up to 6767df245f4736d0cf0c6fb7cf9cf94b27414245: arm64: Do not mask out PTE_RDONLY in pte_same() (2019-11-06 19:31:56 +0000) ---------------------------------------------------------------- arm64 fix for -rc7 - Fix pte_same() to avoid getting stuck on write fault ---------------------------------------------------------------- Catalin Marinas (1): arm64: Do not mask out PTE_RDONLY in pte_same() arch/arm64/include/asm/pgtable.h | 17 ----------------- 1 file changed, 17 deletions(-)