From patchwork Tue Apr 21 01:13:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11500169 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 B4A4B13B2 for ; Tue, 21 Apr 2020 01:13:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 77D23214AF for ; Tue, 21 Apr 2020 01:13:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="f6mJQl5k" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 77D23214AF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 8ADA88E0009; Mon, 20 Apr 2020 21:13:47 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 8849D8E0003; Mon, 20 Apr 2020 21:13:47 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 79AC68E0009; Mon, 20 Apr 2020 21:13:47 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0024.hostedemail.com [216.40.44.24]) by kanga.kvack.org (Postfix) with ESMTP id 5F5F88E0003 for ; Mon, 20 Apr 2020 21:13:47 -0400 (EDT) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 1F042824556B for ; Tue, 21 Apr 2020 01:13:47 +0000 (UTC) X-FDA: 76730090094.20.woman74_5b362cd5b0d02 X-Spam-Summary: 2,0,0,2099d34f8daccb0e,d41d8cd98f00b204,akpm@linux-foundation.org,,RULES_HIT:41:355:379:800:960:967:973:988:989:1260:1263:1345:1359:1381:1431:1437:1534:1541:1711:1730:1747:1777:1792:2194:2199:2393:2525:2559:2563:2682:2685:2859:2902:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3151:3352:3867:3871:3872:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4250:4321:4605:5007:6261:6653:7576:8599:9025:9545:10004:10913:11026:11473:11658:11914:12043:12048:12297:12438:12517:12519:12555:12679:12783:12986:13069:13221:13229:13311:13357:13846:14181:14384:14721:14849:21080:21220:21451:21600:21627:21740:21939:30054:30064,0,RBL:198.145.29.99:@linux-foundation.org:.lbl8.mailshell.net-64.100.201.201 62.2.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: woman74_5b362cd5b0d02 X-Filterd-Recvd-Size: 2691 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf47.hostedemail.com (Postfix) with ESMTP for ; Tue, 21 Apr 2020 01:13:46 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (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 AD81C21D79; Tue, 21 Apr 2020 01:13:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587431626; bh=BAwWHSE3qDv84TUi6lwAgkdn9FjCpSaZomTaEAPmamU=; h=Date:From:To:Subject:In-Reply-To:From; b=f6mJQl5kQdD9dAqaCg9XcjTzmOiEwrG0YLvUH7Zwg4wHQiV8PKw6eLKiWvZ5F5rwM Wtte8zEeBS9I4e3U9K7fiy82c9pV5ogUQdUbnWtic53OSd3eZ6763IditjgpKIrue2 zoxgL0nEsXbS/ZuIPRLYVUkuaZ5fjzl35JcoO/u8= Date: Mon, 20 Apr 2020 18:13:45 -0700 From: Andrew Morton To: aarcange@redhat.com, akpm@linux-foundation.org, hdanton@sina.com, linux-mm@kvack.org, lkp@intel.com, mm-commits@vger.kernel.org, naresh.kamboju@linaro.org, peterx@redhat.com, torvalds@linux-foundation.org Subject: [patch 03/15] mm/userfaultfd: disable userfaultfd-wp on x86_32 Message-ID: <20200421011345.oj5QRcygo%akpm@linux-foundation.org> In-Reply-To: <20200420181310.c18b3c0aa4dc5b3e5ec1be10@linux-foundation.org> User-Agent: s-nail v14.8.16 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: From: Peter Xu Subject: mm/userfaultfd: disable userfaultfd-wp on x86_32 Userfaultfd-wp is not yet working on 32bit hosts, but it's accidentally enabled previously. Disable it. Link: http://lkml.kernel.org/r/20200413141608.109211-1-peterx@redhat.com Fixes: 5a281062af1d ("userfaultfd: wp: add WP pagetable tracking to x86") Signed-off-by: Peter Xu Reported-by: Naresh Kamboju Reported-by: kernel test robot Tested-by: Naresh Kamboju Reviewed-by: Andrea Arcangeli Cc: Hillf Danton Signed-off-by: Andrew Morton --- arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/Kconfig~mm-userfaultfd-disable-userfaultfd-wp-on-x86_32 +++ a/arch/x86/Kconfig @@ -149,7 +149,7 @@ config X86 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64 - select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD + select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD select HAVE_ARCH_VMAP_STACK if X86_64 select HAVE_ARCH_WITHIN_STACK_FRAMES select HAVE_ASM_MODVERSIONS