From: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date: Wed, 6 Jun 2012 15:56:54 +0000 (+0300)
Subject: affs: re-structure superblock locking a bit
X-Git-Tag: upstream/snapshot3+hdmi~6890^2~177
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e0471c8d8abbc2b07fc82f7b02896d1637909319;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

affs: re-structure superblock locking a bit

AFFS wants to serialize the superblock (the root block in AFFS terms) updates
and uses 'lock_super()/unlock_super()' for these purposes. This patch pushes the
locking down to the 'affs_commit_super()' from the callers.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/affs/super.c b/fs/affs/super.c
index c837e43..4ceec56 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -31,11 +31,13 @@ affs_commit_super(struct super_block *sb, int wait)
 	struct buffer_head *bh = sbi->s_root_bh;
 	struct affs_root_tail *tail = AFFS_ROOT_TAIL(sb, bh);
 
+	lock_super(sb);
 	secs_to_datestamp(get_seconds(), &tail->disk_change);
 	affs_fix_checksum(sb, bh);
 	mark_buffer_dirty(bh);
 	if (wait)
 		sync_dirty_buffer(bh);
+	unlock_super(sb);
 }
 
 static void
@@ -54,22 +56,17 @@ affs_put_super(struct super_block *sb)
 static void
 affs_write_super(struct super_block *sb)
 {
-	lock_super(sb);
 	if (!(sb->s_flags & MS_RDONLY))
 		affs_commit_super(sb, 1);
 	sb->s_dirt = 0;
-	unlock_super(sb);
-
 	pr_debug("AFFS: write_super() at %lu, clean=2\n", get_seconds());
 }
 
 static int
 affs_sync_fs(struct super_block *sb, int wait)
 {
-	lock_super(sb);
 	affs_commit_super(sb, wait);
 	sb->s_dirt = 0;
-	unlock_super(sb);
 	return 0;
 }