ext3: Replace lock/unlock_super() with an explicit lock for the orphan list

Use a separate lock to protect the orphan list, so we can stop
overloading the use of lock_super().

Port of ext4 commit 3b9d4ed26680771295d904a6b83e88e620780893
by Theodore Ts'o <tytso@mit.edu>.

CC: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/ext3_fs_sb.h b/include/linux/ext3_fs_sb.h
index f07f34de2f0e..dd61d83026a0 100644
--- a/include/linux/ext3_fs_sb.h
+++ b/include/linux/ext3_fs_sb.h
@@ -72,6 +72,7 @@ struct ext3_sb_info {
         struct inode * s_journal_inode;
         struct journal_s * s_journal;
         struct list_head s_orphan;
+        struct mutex s_orphan_lock;
         unsigned long s_commit_interval;
         struct block_device *journal_bdev;
 #ifdef CONFIG_JBD_DEBUG