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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 580FED149EB for ; Fri, 25 Oct 2024 19:16:21 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4XZsvF3M0Hz3bc6; Sat, 26 Oct 2024 06:15:53 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip="2604:1380:45d1:ec00::3" ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1729883753; cv=none; b=eYCJ/uAsudeIgpvp0/GeZmKJe+5h7EJ/fgGweZdGIhTAwBHCNC9uJ8LLrkoVxLgax7G8ljVy79Tg/WXq4DsI8vo6Y8jTcX+rbwYDLdZO0WwwV0EPzdXIV4EnJMQm0eBa5EEAxxWcxwps/vfBcB9dQMAcVdjSEdfMG4yDG1UTdo7sDb/KvZudwVs7b3r7Z9QrwVq4PQ9zkag643wft11I5T1rpJRU42DZFXuHJNCt2/NVB4Ykyc+++sly/ke5gKq99PiYyyVZGztGqQEXO8/HBUfSI9KFe1d+fTOI/60AcTAOIL/prwLsljNkx15wEWgViVmL6sIhnW6AVwQcy1PGFQ== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1729883753; c=relaxed/relaxed; bh=Gx/NPO77z1DtWpg+Wbv7iCZDKWa05k3zv1GiT7ERGPM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cbshn5lUmNMYE346d529v1ZSgEalHdMU2JYomI96ekkV66FpcitxIiVKgyUBmqR+XUa+JSk4OP5TriiS/8eJvprg4X9N0gOiMMFtb3BpHWOag6rJXey/PjgyJEtKilCbOzoHUlmGMhS46WmL8WIbDG8k2bGv6w9TPhBGjsdGRyrD+y8Jj5S8Y9q3FZd3qZ7p5ciMJua4rPoqknykbhAu8BgV4tL/X6vvCywlk8a5XCSNbbPDLHFBr7VfZzSzmw5kYcHW53/ByefF+BQrOvG2P+p8W8sP0a/1039xlZAnnJsbZYdL3LxllWF3BpbqqvKzn8MlKWNUYPp0ON1lBlxj9Q== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=Ewf3k1fN; dkim-atps=neutral; spf=pass (client-ip=2604:1380:45d1:ec00::3; helo=nyc.source.kernel.org; envelope-from=ebiggers@kernel.org; receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=kernel.org 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=Ewf3k1fN; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=2604:1380:45d1:ec00::3; helo=nyc.source.kernel.org; envelope-from=ebiggers@kernel.org; receiver=lists.ozlabs.org) Received: from nyc.source.kernel.org (nyc.source.kernel.org [IPv6:2604:1380:45d1:ec00::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4XZsvB1Smdz2yN8 for ; Sat, 26 Oct 2024 06:15:49 +1100 (AEDT) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id E2FB1A44C37; Fri, 25 Oct 2024 19:13:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92CA0C4CEF7; Fri, 25 Oct 2024 19:15:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729883746; bh=3ki30lOxrwcmmFT8r/BxBSIWiIgjCokra374LPFdTjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ewf3k1fN8FI5lfS/6w9IFwZ4u6hVpP/Fl0POKQECBxh2jBWAZpuVIzIUxSZROAKf6 BUjn6UW1aFHZHkDdHUd8K46PyIbTrfUHoQVAnyt5ocYS8KAIh7w0dqiIdNyUqxzRXs zyainnf7I542RMLlffmEuRba9rENa8Z7OkVP+DX2ya/xa1MGrdlZVjVq8FQzNJyl/h Mm4tHBFwbQvF4SL1U7JRODcZQsniEHUJfOY3PW1AS/6iECR/HXamD+XEIRJ5Ey1leg 3njI7/DQzTwoOyYlyv6Cw/CUe395fJjoiHorj8UnmtJB+th3baQAp1wmJhGKSKDPWV wa1UzKFgR/x5g== From: Eric Biggers To: linux-kernel@vger.kernel.org Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org Subject: [PATCH v2 04/18] crypto: crc32 - don't unnecessarily register arch algorithms Date: Fri, 25 Oct 2024 12:14:40 -0700 Message-ID: <20241025191454.72616-5-ebiggers@kernel.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241025191454.72616-1-ebiggers@kernel.org> References: <20241025191454.72616-1-ebiggers@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Eric Biggers Instead of registering the crc32-$arch and crc32c-$arch algorithms if the arch-specific code was built, only register them when that code was built *and* is not falling back to the base implementation at runtime. This avoids confusing users like btrfs which checks the shash driver name to determine whether it is crc32c-generic. (It would also make sense to change btrfs to test the crc32_optimization flags itself, so that it doesn't have to use the weird hack of parsing the driver name. This change still makes sense either way though.) Signed-off-by: Eric Biggers --- crypto/crc32_generic.c | 8 ++++++-- crypto/crc32c_generic.c | 8 ++++++-- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/crypto/crc32_generic.c b/crypto/crc32_generic.c index cc064ea8240e..cecd01e4d6e6 100644 --- a/crypto/crc32_generic.c +++ b/crypto/crc32_generic.c @@ -155,19 +155,23 @@ static struct shash_alg algs[] = {{ .base.cra_ctxsize = sizeof(u32), .base.cra_module = THIS_MODULE, .base.cra_init = crc32_cra_init, }}; +static int num_algs; + static int __init crc32_mod_init(void) { /* register the arch flavor only if it differs from the generic one */ - return crypto_register_shashes(algs, 1 + IS_ENABLED(CONFIG_CRC32_ARCH)); + num_algs = 1 + ((crc32_optimizations & CRC32_LE_OPTIMIZATION) != 0); + + return crypto_register_shashes(algs, num_algs); } static void __exit crc32_mod_fini(void) { - crypto_unregister_shashes(algs, 1 + IS_ENABLED(CONFIG_CRC32_ARCH)); + crypto_unregister_shashes(algs, num_algs); } subsys_initcall(crc32_mod_init); module_exit(crc32_mod_fini); diff --git a/crypto/crc32c_generic.c b/crypto/crc32c_generic.c index 04b03d825cf4..47d694da9d4a 100644 --- a/crypto/crc32c_generic.c +++ b/crypto/crc32c_generic.c @@ -195,19 +195,23 @@ static struct shash_alg algs[] = {{ .base.cra_ctxsize = sizeof(struct chksum_ctx), .base.cra_module = THIS_MODULE, .base.cra_init = crc32c_cra_init, }}; +static int num_algs; + static int __init crc32c_mod_init(void) { /* register the arch flavor only if it differs from the generic one */ - return crypto_register_shashes(algs, 1 + IS_ENABLED(CONFIG_CRC32_ARCH)); + num_algs = 1 + ((crc32_optimizations & CRC32C_OPTIMIZATION) != 0); + + return crypto_register_shashes(algs, num_algs); } static void __exit crc32c_mod_fini(void) { - crypto_unregister_shashes(algs, 1 + IS_ENABLED(CONFIG_CRC32_ARCH)); + crypto_unregister_shashes(algs, num_algs); } subsys_initcall(crc32c_mod_init); module_exit(crc32c_mod_fini); -- 2.47.0