From patchwork Tue Jul 27 14:48:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 12402985 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E58D5C4338F for ; Tue, 27 Jul 2021 14:49:22 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 590AB61B05 for ; Tue, 27 Jul 2021 14:49:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 590AB61B05 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id A716E6B0036; Tue, 27 Jul 2021 10:49:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A21D76B005D; Tue, 27 Jul 2021 10:49:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 90FB78D0001; Tue, 27 Jul 2021 10:49:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0120.hostedemail.com [216.40.44.120]) by kanga.kvack.org (Postfix) with ESMTP id 7361D6B0036 for ; Tue, 27 Jul 2021 10:49:21 -0400 (EDT) Received: from smtpin19.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 16B881809A4A1 for ; Tue, 27 Jul 2021 14:49:21 +0000 (UTC) X-FDA: 78408650922.19.7CCAD23 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf01.hostedemail.com (Postfix) with ESMTP id A7F41500C4DC for ; Tue, 27 Jul 2021 14:49:20 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 3559861AFD; Tue, 27 Jul 2021 14:49:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1627397359; bh=Tjiwf4/hYWXFn9aUgPpl3D0HHZbelU5u+FTy8tvX/BA=; h=From:To:Cc:Subject:Date:From; b=Jm0Ghr4DY8S8DbJUMOgzNYNZ9TpUDawl2m4udsOCvZu6uErY0ceZK1ugOzDu5GYfU FcpYwKuxA6AjAy3zyCgVACtAq/UWFPG3mNHsh8tFDA5zWzInxHIu8o0jJfWh5vuzLj ++JkgaoWIL8JM41Ld9ZSmOyhjlGS5DRNjCGi0qceKIOC/UT+DuY98htxeqdY7x3FKV 40uaxkb5SA6kv5iFRlvbFCA5wazm8JgMVhL91/E5GnpKc2GEeZREYLyo0ppxHTqLHX HXWc8AwqP3FWNXks7HkSQo4WKwHmUdrLF/lKZgKuXzZvtIgXac3yNPJy/etARITDNG 3IhheeU5vs0Kw== From: Arnd Bergmann To: Andrew Morton Cc: Arnd Bergmann , Catalin Marinas , Will Deacon , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , "David S. Miller" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Al Viro , "Eric W. Biederman" , Christoph Hellwig , Feng Tang , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v5 0/6] compat: remove compat_alloc_user_space Date: Tue, 27 Jul 2021 16:48:53 +0200 Message-Id: <20210727144859.4150043-1-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: A7F41500C4DC Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=Jm0Ghr4D; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf01.hostedemail.com: domain of arnd@kernel.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=arnd@kernel.org X-Stat-Signature: gnofd81xdxsmhmnsswu11kchmjxoawpu X-HE-Tag: 1627397360-93357 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: Arnd Bergmann Going through compat_alloc_user_space() to convert indirect system call arguments tends to add complexity compared to handling the native and compat logic in the same code. Out of the other remaining callers, the linux-media series went into v5.14, and the network ioctl handling is now fixed in net-next, so these are the last remaining users, and I now include the final patch to remove the definitions as well. Since these patches are now all that remains, it would be nice to merge it all through Andrew's Linux-mm tree, which is already based on top of linux-next. Arnd --- Changes in v4: - Rebase on top of net-next - Split up and improve the kexec patch based on Christoph's suggestions - Include final patch to remove compat_alloc_user_space - Cc compat architecture maintainers Link: https://lore.kernel.org/lkml/20210720150950.3669610-1-arnd@kernel.org/ Changes in v3: - fix whitespace as pointed out by Christoph Hellwig - minor build fixes - rebase to v5.13-rc1 Link: https://lore.kernel.org/lkml/20210517203343.3941777-1-arnd@kernel.org/ Changes in v2: - address review comments from Christoph Hellwig - split syscall removal into a separate patch - replace __X32_COND_SYSCALL() with individual macros for x32 Link: https://lore.kernel.org/lkml/20201208150614.GA15765@infradead.org/ Arnd Bergmann (6): kexec: move locking into do_kexec_load kexec: avoid compat_alloc_user_space mm: simplify compat_sys_move_pages mm: simplify compat numa syscalls compat: remove some compat entry points arch: remove compat_alloc_user_space arch/arm64/include/asm/compat.h | 5 - arch/arm64/include/asm/uaccess.h | 11 -- arch/arm64/include/asm/unistd32.h | 10 +- arch/arm64/lib/Makefile | 2 +- arch/arm64/lib/copy_in_user.S | 77 --------- arch/mips/cavium-octeon/octeon-memcpy.S | 2 - arch/mips/include/asm/compat.h | 8 - arch/mips/include/asm/uaccess.h | 26 --- arch/mips/kernel/syscalls/syscall_n32.tbl | 10 +- arch/mips/kernel/syscalls/syscall_o32.tbl | 10 +- arch/mips/lib/memcpy.S | 11 -- arch/parisc/include/asm/compat.h | 6 - arch/parisc/include/asm/uaccess.h | 2 - arch/parisc/kernel/syscalls/syscall.tbl | 8 +- arch/parisc/lib/memcpy.c | 9 - arch/powerpc/include/asm/compat.h | 16 -- arch/powerpc/kernel/syscalls/syscall.tbl | 10 +- arch/s390/include/asm/compat.h | 10 -- arch/s390/include/asm/uaccess.h | 3 - arch/s390/kernel/syscalls/syscall.tbl | 10 +- arch/s390/lib/uaccess.c | 63 ------- arch/sparc/include/asm/compat.h | 19 --- arch/sparc/kernel/process_64.c | 2 +- arch/sparc/kernel/signal32.c | 12 +- arch/sparc/kernel/signal_64.c | 8 +- arch/sparc/kernel/syscalls/syscall.tbl | 10 +- arch/x86/entry/syscalls/syscall_32.tbl | 4 +- arch/x86/entry/syscalls/syscall_64.tbl | 2 +- arch/x86/include/asm/compat.h | 13 -- arch/x86/include/asm/uaccess_64.h | 7 - include/linux/compat.h | 39 +---- include/linux/uaccess.h | 10 -- include/uapi/asm-generic/unistd.h | 10 +- kernel/compat.c | 21 --- kernel/kexec.c | 103 +++++------- kernel/sys_ni.c | 5 - mm/mempolicy.c | 196 +++++----------------- mm/migrate.c | 50 +++--- 38 files changed, 175 insertions(+), 645 deletions(-) delete mode 100644 arch/arm64/lib/copy_in_user.S