ext3: revert "ext3: wait on all pending commits in ext3_sync_fs"

This reverts commit c87591b719737b4e91eb1a9fa8fd55a4ff1886d6.

Since journal_start_commit() is now fixed to return 1 when we started a
transaction commit, there's some transaction waiting to be committed or
there's a transaction already committing, we don't need to call
ext3_force_commit() in ext3_sync_fs(). Furthermore ext3_force_commit()
can unnecessarily create sync transaction which is expensive so it's
worthwhile to remove it when we can.

Cc: Eric Sandeen <[e-mail]>
Cc: <[e-mail]>
Signed-off-by: Jan Kara <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/ext3/super.c

···
 
 static int ext3_sync_fs(struct super_block *sb, int wait)
 {
-	sb->s_dirt = 0;
-	if (wait)
-		ext3_force_commit(sb);
-	else
-		journal_start_commit(EXT3_SB(sb)->s_journal, NULL);
+	tid_t target;
 
+	sb->s_dirt = 0;
+	if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
+		if (wait)
+			log_wait_commit(EXT3_SB(sb)->s_journal, target);
+	}
 	return 0;
 }