From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1B0A0161B75; Thu, 29 Feb 2024 20:40:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709239211; cv=none; b=ml/9C6OgWI02jFasnDFGW+ovCeUvCZWTEgrLd9gm0cCk3tNTRHyWJT2jZi6tjC1SJ3eKkeR0pwcS1hNA0o46r291hw1VHAyjiUL6zxicfzVJmAXtPAIIsKHeNqUfOYTmgket8ghiCs+wcJTc8ul3MnHMcGDFgecIQNh4eBU2KGk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709239211; c=relaxed/simple; bh=/trDRVjr/rl5P+VDqa4+Jil5XnsArhakGC5pLLP4Hss=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ko+okbecbnsuzvYjYrBPU3i5Gahi0bUDv4d7ChRuWM0iueAUd+5nclycELloHvALX+ld5T2h4Jb5aZ41vC0cfgzRMwQXAMLnuReB6Rb6czAvHQSFOyv2bj/2G5U1uZNvPHth/I+uxYiUVx+bL+UQgmS8xAoRkFWkTwMJNS8cmgI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nEDAHzp4; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nEDAHzp4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1461C43394; Thu, 29 Feb 2024 20:40:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1709239209; bh=/trDRVjr/rl5P+VDqa4+Jil5XnsArhakGC5pLLP4Hss=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nEDAHzp4PC/i0bipTRkrWTxvQG9vWj17OSP7nTtUaDaIlS1JtSDWlIgvvo7dn0MP0 jJCV1OClR40oMjvVF8N/gmccvWKgIOqi6xEs9oLsVQx0jZVPV/tZDZ2jpLR62L5T8i pIIk2gsjy1q04UvxoyrsQoSTT6eUJGB0tKZZ7euQ0QPfDDYXz3/UgGoQDzrTHtnMs1 QE5CyQNL9MF5J0hI2QFX56Rs9/5GpFMgEGB9CiAKHyDbkDqedv6za1Ccz3NATnEAL2 kYqz+5cYvQp3W8odx9iu7kMSq/2rhE8KLP8RflAhIILYVaL0qqtrV898nPln+C1blj 7+k/sEY097zAQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Mikulas Patocka , Mike Snitzer , Sasha Levin , agk@redhat.com, dm-devel@lists.linux.dev Subject: [PATCH AUTOSEL 6.6 17/22] dm-verity, dm-crypt: align "struct bvec_iter" correctly Date: Thu, 29 Feb 2024 15:39:10 -0500 Message-ID: <20240229203933.2861006-17-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240229203933.2861006-1-sashal@kernel.org> References: <20240229203933.2861006-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.18 Content-Transfer-Encoding: 8bit From: Mikulas Patocka [ Upstream commit 787f1b2800464aa277236a66eb3c279535edd460 ] "struct bvec_iter" is defined with the __packed attribute, so it is aligned on a single byte. On X86 (and on other architectures that support unaligned addresses in hardware), "struct bvec_iter" is accessed using the 8-byte and 4-byte memory instructions, however these instructions are less efficient if they operate on unaligned addresses. (on RISC machines that don't have unaligned access in hardware, GCC generates byte-by-byte accesses that are very inefficient - see [1]) This commit reorders the entries in "struct dm_verity_io" and "struct convert_context", so that "struct bvec_iter" is aligned on 8 bytes. [1] https://lore.kernel.org/all/ZcLuWUNRZadJr0tQ@fedora/T/ Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer Signed-off-by: Sasha Levin --- drivers/md/dm-crypt.c | 4 ++-- drivers/md/dm-verity.h | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index 1a539ec81bacc..a230b0639f81b 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -53,11 +53,11 @@ struct convert_context { struct completion restart; struct bio *bio_in; - struct bio *bio_out; struct bvec_iter iter_in; + struct bio *bio_out; struct bvec_iter iter_out; - u64 cc_sector; atomic_t cc_pending; + u64 cc_sector; union { struct skcipher_request *req; struct aead_request *req_aead; diff --git a/drivers/md/dm-verity.h b/drivers/md/dm-verity.h index f3f6070084196..5265b0d9ea37c 100644 --- a/drivers/md/dm-verity.h +++ b/drivers/md/dm-verity.h @@ -76,12 +76,12 @@ struct dm_verity_io { /* original value of bio->bi_end_io */ bio_end_io_t *orig_bi_end_io; + struct bvec_iter iter; + sector_t block; unsigned int n_blocks; bool in_tasklet; - struct bvec_iter iter; - struct work_struct work; /* -- 2.43.0