From patchwork Wed Sep 4 02:08:51 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gao Xiang X-Patchwork-Id: 11129125 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8B3E61813 for ; Wed, 4 Sep 2019 02:10:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6CE2B233A1 for ; Wed, 4 Sep 2019 02:10:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727692AbfIDCKQ (ORCPT ); Tue, 3 Sep 2019 22:10:16 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:5738 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726925AbfIDCKQ (ORCPT ); Tue, 3 Sep 2019 22:10:16 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 4D35536BA690EBFB9591; Wed, 4 Sep 2019 10:10:15 +0800 (CST) Received: from architecture4.huawei.com (10.140.130.215) by smtp.huawei.com (10.3.19.211) with Microsoft SMTP Server (TLS) id 14.3.439.0; Wed, 4 Sep 2019 10:10:08 +0800 From: Gao Xiang To: Chao Yu , Greg Kroah-Hartman , Christoph Hellwig , CC: , , Chao Yu , Miao Xie , Gao Xiang Subject: [PATCH v2 04/25] erofs: kill __packed for on-disk structures Date: Wed, 4 Sep 2019 10:08:51 +0800 Message-ID: <20190904020912.63925-5-gaoxiang25@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190904020912.63925-1-gaoxiang25@huawei.com> References: <20190901055130.30572-1-hsiangkao@aol.com> <20190904020912.63925-1-gaoxiang25@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.140.130.215] X-CFilter-Loop: Reflected Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org As Christoph suggested "Please don't add __packed" [1], remove all __packed except struct erofs_dirent here. Note that all on-disk fields except struct erofs_dirent (12 bytes with a 8-byte nid) in EROFS are naturally aligned. [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig Signed-off-by: Gao Xiang --- fs/erofs/erofs_fs.h | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h index c1220b0f26e0..59dcc2e8cb02 100644 --- a/fs/erofs/erofs_fs.h +++ b/fs/erofs/erofs_fs.h @@ -38,7 +38,7 @@ struct erofs_super_block { __le32 requirements; /* (aka. feature_incompat) */ __u8 reserved2[44]; -} __packed; +}; /* * erofs inode data mapping: @@ -91,12 +91,12 @@ struct erofs_inode_v1 { /* for device files, used to indicate old/new device # */ __le32 rdev; - } i_u __packed; + } i_u; __le32 i_ino; /* only used for 32-bit stat compatibility */ __le16 i_uid; __le16 i_gid; __le32 i_reserved2; -} __packed; +}; /* 32 bytes on-disk inode */ #define EROFS_INODE_LAYOUT_V1 0 @@ -119,7 +119,7 @@ struct erofs_inode_v2 { /* for device files, used to indicate old/new device # */ __le32 rdev; - } i_u __packed; + } i_u; /* only used for 32-bit stat compatibility */ __le32 i_ino; @@ -130,7 +130,7 @@ struct erofs_inode_v2 { __le32 i_ctime_nsec; __le32 i_nlink; __u8 i_reserved2[16]; -} __packed; +}; #define EROFS_MAX_SHARED_XATTRS (128) /* h_shared_count between 129 ... 255 are special # */ @@ -152,7 +152,7 @@ struct erofs_xattr_ibody_header { __u8 h_shared_count; __u8 h_reserved2[7]; __le32 h_shared_xattrs[0]; /* shared xattr id array */ -} __packed; +}; /* Name indexes */ #define EROFS_XATTR_INDEX_USER 1 @@ -169,7 +169,7 @@ struct erofs_xattr_entry { __le16 e_value_size; /* size of attribute value */ /* followed by e_name and e_value */ char e_name[0]; /* attribute name */ -} __packed; +}; static inline unsigned int erofs_xattr_ibody_size(__le16 i_xattr_icount) { @@ -273,8 +273,8 @@ struct z_erofs_vle_decompressed_index { * [1] - pointing to the tail cluster */ __le16 delta[2]; - } di_u __packed; -} __packed; + } di_u; +}; #define Z_EROFS_VLE_LEGACY_INDEX_ALIGN(size) \ (round_up(size, sizeof(struct z_erofs_vle_decompressed_index)) + \