From patchwork Sun Nov 3 22:31:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Biggers X-Patchwork-Id: 13860605 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 lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 13DE2D11197 for ; Sun, 3 Nov 2024 22:32:45 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-2.v29.lw.sourceforge.com) by sfs-ml-2.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1t7j9I-0007Pl-NM; Sun, 03 Nov 2024 22:32:44 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-2.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1t7j9H-0007PV-Eu for linux-f2fs-devel@lists.sourceforge.net; Sun, 03 Nov 2024 22:32:43 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=gT68VJg2Ax+gMpOGHi4H3PWPYTj8DTpPT3IZ5CLlAgo=; b=l7PqQQFRLBvrDPXEW8tfsNcKg0 6fkEDhS4JOAkpHNFv6KoJl/ictyoJDFA376DZKlC5ddFwpvYgU+7qppGRScJgd7QLkrKgr5fwL6aR PfTcHpTxEzMMK2LVw+pLHsJVyEPqKneSTr/VfaObvzOXC1EuHUjpcNWzj8kTIJMshzdM=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=gT68VJg2Ax+gMpOGHi4H3PWPYTj8DTpPT3IZ5CLlAgo=; b=jRTqA4SObNx+9ZdFLPz073M0Mo De3HayHlV/aprfSxdzCeldT7fDnwA+aTtXIJcwy0stG78rLoV1HYAhLE/oGR7sV0/ZVXcQbms8+wL 99xXxxO0w68oHP3/PpFaqa7QnyvoiuIhTV/A7ajn0plp7OwdmmlrHzOr3c6l2WXvXbIU=; Received: from dfw.source.kernel.org ([139.178.84.217]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1t7j9G-0005sQ-L1 for linux-f2fs-devel@lists.sourceforge.net; Sun, 03 Nov 2024 22:32:43 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 6C6895C4C2F; Sun, 3 Nov 2024 22:31:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 788B7C4CED6; Sun, 3 Nov 2024 22:32:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730673151; bh=hmjPSLT23tUvD2mhqpKoKr7fMC5StQtNq+9niGNg1xs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Tpo5PFXj/m4NE6etEzQOOpPtYejpQ6IyEVf/EeYCb8tkKb0CbNlzB9cqqtXVtKsb4 ZpQGhkvVcl/tUEerW2a8LKa2qXGHFXzplvZXn6uMuBrTjz9ciJlXFNVtrcU/h9frd0 86FQ8VL7p1lQ3XyzZiPYABO0V8f1lYjXdBVP9qRed5zCEAT40rOPTRuj5I7ykuqKUo of8Q3GNyp0aJT4rBPpEy6mhQgfIQpHMeXXQQcIktnre8ZBm3I0BiW3Y3dCPReAUzrl gp02hfbdFL8Jobk4i3Tfl80tx19I0JOVpan1dsfVTjxNCPJFs7wOT50Jd4u1rxnmio IwxnJCXPSY/4g== To: linux-kernel@vger.kernel.org Date: Sun, 3 Nov 2024 14:31:50 -0800 Message-ID: <20241103223154.136127-15-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241103223154.136127-1-ebiggers@kernel.org> References: <20241103223154.136127-1-ebiggers@kernel.org> MIME-Version: 1.0 X-Headers-End: 1t7j9G-0005sQ-L1 Subject: [f2fs-dev] [PATCH v3 14/18] lib/crc32: make crc32c() go directly to lib X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Eric Biggers via Linux-f2fs-devel From: Eric Biggers Reply-To: Eric Biggers Cc: linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, x86@kernel.org, linux-mips@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-crypto@vger.kernel.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, linux-ext4@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Ard Biesheuvel , linux-arm-kernel@lists.infradead.org Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Eric Biggers Now that the lower level __crc32c_le() library function is optimized for each architecture, make crc32c() just call that instead of taking an inefficient and error-prone detour through the shash API. Note: a future cleanup should make crc32c_le() be the actual library function instead of __crc32c_le(). That will require updating callers of __crc32c_le() to use crc32c_le() instead, and updating callers of crc32c_le() that expect a 'const void *' arg to expect 'const u8 *' instead. Similarly, a future cleanup should remove LIBCRC32C by making everyone who is selecting it just select CRC32 directly instead. Reviewed-by: Ard Biesheuvel Signed-off-by: Eric Biggers --- include/linux/crc32c.h | 7 ++-- lib/Kconfig | 10 ++---- lib/Makefile | 1 - lib/libcrc32c.c | 74 ------------------------------------------ 4 files changed, 8 insertions(+), 84 deletions(-) delete mode 100644 lib/libcrc32c.c diff --git a/include/linux/crc32c.h b/include/linux/crc32c.h index 357ae4611a45..47eb78003c26 100644 --- a/include/linux/crc32c.h +++ b/include/linux/crc32c.h @@ -1,12 +1,15 @@ /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_CRC32C_H #define _LINUX_CRC32C_H -#include +#include -extern u32 crc32c(u32 crc, const void *address, unsigned int length); +static inline u32 crc32c(u32 crc, const void *address, unsigned int length) +{ + return __crc32c_le(crc, address, length); +} /* This macro exists for backwards-compatibility. */ #define crc32c_le crc32c #endif /* _LINUX_CRC32C_H */ diff --git a/lib/Kconfig b/lib/Kconfig index 07afcf214f35..b894ee64ff95 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -296,18 +296,14 @@ config CRC7 the kernel tree does. Such modules that use library CRC7 functions require M here. config LIBCRC32C tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" - select CRYPTO - select CRYPTO_CRC32C + select CRC32 help - This option is provided for the case where no in-kernel-tree - modules require CRC32c functions, but a module built outside the - kernel tree does. Such modules that use library CRC32c functions - require M here. See Castagnoli93. - Module will be libcrc32c. + This option just selects CRC32 and is provided for compatibility + purposes until the users are updated to select CRC32 directly. config CRC8 tristate "CRC8 function" help This option provides CRC8 function. Drivers may select this diff --git a/lib/Makefile b/lib/Makefile index 773adf88af41..15646679aee2 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -161,11 +161,10 @@ obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o obj-$(CONFIG_CRC32) += crc32.o obj-$(CONFIG_CRC64) += crc64.o obj-$(CONFIG_CRC32_SELFTEST) += crc32test.o obj-$(CONFIG_CRC4) += crc4.o obj-$(CONFIG_CRC7) += crc7.o -obj-$(CONFIG_LIBCRC32C) += libcrc32c.o obj-$(CONFIG_CRC8) += crc8.o obj-$(CONFIG_CRC64_ROCKSOFT) += crc64-rocksoft.o obj-$(CONFIG_XXHASH) += xxhash.o obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o diff --git a/lib/libcrc32c.c b/lib/libcrc32c.c deleted file mode 100644 index 649e687413a0..000000000000 --- a/lib/libcrc32c.c +++ /dev/null @@ -1,74 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * CRC32C - *@Article{castagnoli-crc, - * author = { Guy Castagnoli and Stefan Braeuer and Martin Herrman}, - * title = {{Optimization of Cyclic Redundancy-Check Codes with 24 - * and 32 Parity Bits}}, - * journal = IEEE Transactions on Communication, - * year = {1993}, - * volume = {41}, - * number = {6}, - * pages = {}, - * month = {June}, - *} - * Used by the iSCSI driver, possibly others, and derived from - * the iscsi-crc.c module of the linux-iscsi driver at - * http://linux-iscsi.sourceforge.net. - * - * Following the example of lib/crc32, this function is intended to be - * flexible and useful for all users. Modules that currently have their - * own crc32c, but hopefully may be able to use this one are: - * net/sctp (please add all your doco to here if you change to - * use this one!) - * - * - * Copyright (c) 2004 Cisco Systems, Inc. - */ - -#include -#include -#include -#include -#include -#include - -static struct crypto_shash *tfm; - -u32 crc32c(u32 crc, const void *address, unsigned int length) -{ - SHASH_DESC_ON_STACK(shash, tfm); - u32 ret, *ctx = (u32 *)shash_desc_ctx(shash); - int err; - - shash->tfm = tfm; - *ctx = crc; - - err = crypto_shash_update(shash, address, length); - BUG_ON(err); - - ret = *ctx; - barrier_data(ctx); - return ret; -} - -EXPORT_SYMBOL(crc32c); - -static int __init libcrc32c_mod_init(void) -{ - tfm = crypto_alloc_shash("crc32c", 0, 0); - return PTR_ERR_OR_ZERO(tfm); -} - -static void __exit libcrc32c_mod_fini(void) -{ - crypto_free_shash(tfm); -} - -module_init(libcrc32c_mod_init); -module_exit(libcrc32c_mod_fini); - -MODULE_AUTHOR("Clay Haapala "); -MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations"); -MODULE_LICENSE("GPL"); -MODULE_SOFTDEP("pre: crc32c");