Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933979Ab2FEL1F (ORCPT ); Tue, 5 Jun 2012 07:27:05 -0400 Received: from mga14.intel.com ([143.182.124.37]:1606 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754756Ab2FEL1D (ORCPT ); Tue, 5 Jun 2012 07:27:03 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="151777546" From: Artem Bityutskiy To: Al Viro Cc: Linux FS Maling List , Linux Kernel Maling List Subject: [PATCH 1/7] affs: remove strange argument of affs_commit_super Date: Tue, 5 Jun 2012 14:28:09 +0300 Message-Id: <1338895695-10362-2-git-send-email-dedekind1@gmail.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1338895695-10362-1-git-send-email-dedekind1@gmail.com> References: <1338895695-10362-1-git-send-email-dedekind1@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2967 Lines: 83 From: Artem Bityutskiy The 'affs_commit_super()' function takes a 'clean' argument which it stores in the 'bm_flags' field of the AFFS root block. This patch removes it to make the code simpler and cleaner and enable few other clean-ups. Currently AFFS stores values '1' and '2' in 'bm_flags', and I fail to see any logic when it prefers one or another. AFFS writes '1' only from '->put_super()', while '->sync_fs()' and '->write_super()' store value '2'. So on the first glance, it looks like we want to have '1' if we unmount. However, this does not really happen in these cases: 1. superblock is written via 'write_super()' then we unmount; 2. we re-mount R/O, then unmount. which are quite typical. I could not find good documentation describing this field, except of one random piece of documentation in the internet which says that -1 means that the root block is valid, which is not consistent with what we have in the Linux AFFS driver. Thus, my conclusion is that value of '1' is as good as value of '2' and we can just always use '2'. This is exactly what this patch does. Signed-off-by: Artem Bityutskiy --- fs/affs/super.c | 10 +++++----- 1 files changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/affs/super.c b/fs/affs/super.c index 0782653..698282a 100644 --- a/fs/affs/super.c +++ b/fs/affs/super.c @@ -25,13 +25,13 @@ static int affs_statfs(struct dentry *dentry, struct kstatfs *buf); static int affs_remount (struct super_block *sb, int *flags, char *data); static void -affs_commit_super(struct super_block *sb, int wait, int clean) +affs_commit_super(struct super_block *sb, int wait) { struct affs_sb_info *sbi = AFFS_SB(sb); struct buffer_head *bh = sbi->s_root_bh; struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh); - tail->bm_flag = cpu_to_be32(clean); + tail->bm_flag = cpu_to_be32(2); secs_to_datestamp(get_seconds(), &tail->disk_change); affs_fix_checksum(sb, bh); mark_buffer_dirty(bh); @@ -46,7 +46,7 @@ affs_put_super(struct super_block *sb) pr_debug("AFFS: put_super()\n"); if (!(sb->s_flags & MS_RDONLY) && sb->s_dirt) - affs_commit_super(sb, 1, 1); + affs_commit_super(sb, 1); kfree(sbi->s_prefix); affs_free_bitmap(sb); @@ -60,7 +60,7 @@ affs_write_super(struct super_block *sb) { lock_super(sb); if (!(sb->s_flags & MS_RDONLY)) - affs_commit_super(sb, 1, 2); + affs_commit_super(sb, 1); sb->s_dirt = 0; unlock_super(sb); @@ -71,7 +71,7 @@ static int affs_sync_fs(struct super_block *sb, int wait) { lock_super(sb); - affs_commit_super(sb, wait, 2); + affs_commit_super(sb, wait); sb->s_dirt = 0; unlock_super(sb); return 0; -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/