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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 AFF7DC433B4 for ; Fri, 14 May 2021 10:02:41 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 D50C46101D for ; Fri, 14 May 2021 10:02:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D50C46101D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FhPGR1HNhz30CZ for ; Fri, 14 May 2021 20:02:39 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=iCIXGblw; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=arnd@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=iCIXGblw; dkim-atps=neutral Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FhPFt0FTbz2yWp for ; Fri, 14 May 2021 20:02:09 +1000 (AEST) Received: by mail.kernel.org (Postfix) with ESMTPSA id CB4D2613BC; Fri, 14 May 2021 10:01:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620986526; bh=GrjPHc36lucdUSuooC9aqhL2Od7+jfK0fPUigqnZcVA=; h=From:To:Cc:Subject:Date:From; b=iCIXGblwqBis0HCCaKglHVxXgHdjY+ZnJUEpxhS25qd0YTOmPIMwFqlt0gAwqFaCn H6TYlYBWCxImWVPxQaXnme+hpROYqMTCLF2Ei6uKrfHadRhs+ayz5bA3lk5FtTeO/J kbiLtSut3lU229IM7sF582cRjJivSN3xcEhAoo9aZUac6zWidfJ8NHVAJjY3Rp7yEE dYKIekHBKs/JVyWBTb6nx0reJMz2nGFhAf8LBgLNfsP72b9qNOGH6t05d70F9GjPY+ 8sZc7aQR/6sMfmjSb+dYlYAWu/wuLtjPqPhcgnm4RJEAMEiB7smvyJnpuMYADmfYdd sGrgg1bm/9cMA== From: Arnd Bergmann To: linux-arch@vger.kernel.org Subject: [PATCH v2 00/13] Unify asm/unaligned.h around struct helper Date: Fri, 14 May 2021 12:00:48 +0200 Message-Id: <20210514100106.3404011-1-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rich Felker , linux-sh@vger.kernel.org, "Richard Russon \(FlatCap\)" , Amitkumar Karwar , Russell King , Eric Dumazet , Paul Mackerras , "H. Peter Anvin" , sparclinux@vger.kernel.org, Thomas Gleixner , Jonas Bonn , Florian Fainelli , Yoshinori Sato , x86@kernel.org, James Morris , Ingo Molnar , Geert Uytterhoeven , linux-arm-kernel@lists.infradead.org, Jakub Kicinski , "Serge E. Hallyn" , Arnd Bergmann , Ganapathi Bhat , linuxppc-dev@lists.ozlabs.org, Stefan Kristiansson , linux-block@vger.kernel.org, linux-m68k@lists.linux-m68k.org, openrisc@lists.librecores.org, Borislav Petkov , Stafford Horne , Kalle Valo , Jens Axboe , John Johansen , Xinming Hu , Vineet Gupta , linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Vladimir Oltean , linux-ntfs-dev@lists.sourceforge.net, linux-security-module@vger.kernel.org, linux-crypto@vger.kernel.org, netdev@vger.kernel.org, Linus Torvalds , Sharvari Harisangam Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Arnd Bergmann The get_unaligned()/put_unaligned() helpers are traditionally architecture specific, with the two main variants being the "access-ok.h" version that assumes unaligned pointer accesses always work on a particular architecture, and the "le-struct.h" version that casts the data to a byte aligned type before dereferencing, for architectures that cannot always do unaligned accesses in hardware. Based on the discussion linked below, it appears that the access-ok version is not realiable on any architecture, but the struct version probably has no downsides. This series changes the code to use the same implementation on all architectures, addressing the few exceptions separately. I've included this version in the asm-generic tree for 5.14 already, addressing the few issues that were pointed out in the RFC. If there are any remaining problems, I hope those can be addressed as follow-up patches. Arnd Link: https://lore.kernel.org/lkml/75d07691-1e4f-741f-9852-38c0b4f520bc@synopsys.com/ Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100363 Link: https://lore.kernel.org/lkml/20210507220813.365382-14-arnd@kernel.org/ Link: git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git unaligned-rework-v2 Arnd Bergmann (13): asm-generic: use asm-generic/unaligned.h for most architectures openrisc: always use unaligned-struct header sh: remove unaligned access for sh4a m68k: select CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS powerpc: use linux/unaligned/le_struct.h on LE power7 asm-generic: unaligned: remove byteshift helpers asm-generic: unaligned always use struct helpers partitions: msdos: fix one-byte get_unaligned() apparmor: use get_unaligned() only for multi-byte words mwifiex: re-fix for unaligned accesses netpoll: avoid put_unaligned() on single character asm-generic: uaccess: 1-byte access is always aligned asm-generic: simplify asm/unaligned.h arch/alpha/include/asm/unaligned.h | 12 -- arch/arm/include/asm/unaligned.h | 27 --- arch/ia64/include/asm/unaligned.h | 12 -- arch/m68k/Kconfig | 1 + arch/m68k/include/asm/unaligned.h | 26 --- arch/microblaze/include/asm/unaligned.h | 27 --- arch/mips/crypto/crc32-mips.c | 2 +- arch/openrisc/include/asm/unaligned.h | 47 ----- arch/parisc/include/asm/unaligned.h | 6 +- arch/powerpc/include/asm/unaligned.h | 22 --- arch/sh/include/asm/unaligned-sh4a.h | 199 -------------------- arch/sh/include/asm/unaligned.h | 13 -- arch/sparc/include/asm/unaligned.h | 11 -- arch/x86/include/asm/unaligned.h | 15 -- arch/xtensa/include/asm/unaligned.h | 29 --- block/partitions/ldm.h | 2 +- block/partitions/msdos.c | 2 +- drivers/net/wireless/marvell/mwifiex/pcie.c | 10 +- include/asm-generic/uaccess.h | 4 +- include/asm-generic/unaligned.h | 141 +++++++++++--- include/linux/unaligned/access_ok.h | 68 ------- include/linux/unaligned/be_byteshift.h | 71 ------- include/linux/unaligned/be_memmove.h | 37 ---- include/linux/unaligned/be_struct.h | 37 ---- include/linux/unaligned/generic.h | 115 ----------- include/linux/unaligned/le_byteshift.h | 71 ------- include/linux/unaligned/le_memmove.h | 37 ---- include/linux/unaligned/le_struct.h | 37 ---- include/linux/unaligned/memmove.h | 46 ----- net/core/netpoll.c | 4 +- security/apparmor/policy_unpack.c | 2 +- 31 files changed, 131 insertions(+), 1002 deletions(-) delete mode 100644 arch/alpha/include/asm/unaligned.h delete mode 100644 arch/arm/include/asm/unaligned.h delete mode 100644 arch/ia64/include/asm/unaligned.h delete mode 100644 arch/m68k/include/asm/unaligned.h delete mode 100644 arch/microblaze/include/asm/unaligned.h delete mode 100644 arch/openrisc/include/asm/unaligned.h delete mode 100644 arch/powerpc/include/asm/unaligned.h delete mode 100644 arch/sh/include/asm/unaligned-sh4a.h delete mode 100644 arch/sh/include/asm/unaligned.h delete mode 100644 arch/sparc/include/asm/unaligned.h delete mode 100644 arch/x86/include/asm/unaligned.h delete mode 100644 arch/xtensa/include/asm/unaligned.h delete mode 100644 include/linux/unaligned/access_ok.h delete mode 100644 include/linux/unaligned/be_byteshift.h delete mode 100644 include/linux/unaligned/be_memmove.h delete mode 100644 include/linux/unaligned/be_struct.h delete mode 100644 include/linux/unaligned/generic.h delete mode 100644 include/linux/unaligned/le_byteshift.h delete mode 100644 include/linux/unaligned/le_memmove.h delete mode 100644 include/linux/unaligned/le_struct.h delete mode 100644 include/linux/unaligned/memmove.h -- 2.29.2 Cc: Amitkumar Karwar Cc: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Eric Dumazet Cc: Florian Fainelli Cc: Ganapathi Bhat Cc: Geert Uytterhoeven Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jakub Kicinski Cc: James Morris Cc: Jens Axboe Cc: John Johansen Cc: Jonas Bonn Cc: Kalle Valo Cc: Michael Ellerman Cc: Paul Mackerras Cc: Rich Felker Cc: "Richard Russon (FlatCap)" Cc: Russell King Cc: "Serge E. Hallyn" Cc: Sharvari Harisangam Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Thomas Gleixner Cc: Vladimir Oltean Cc: Xinming Hu Cc: Yoshinori Sato Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-m68k@lists.linux-m68k.org Cc: linux-crypto@vger.kernel.org Cc: openrisc@lists.librecores.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-sh@vger.kernel.org Cc: sparclinux@vger.kernel.org Cc: linux-ntfs-dev@lists.sourceforge.net Cc: linux-block@vger.kernel.org Cc: linux-wireless@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-security-module@vger.kernel.org