tree c6a44d0b1cfc13d2449cf0d8ff8b7bae06bf0df1
parent b939d1ab76b4aa816343cdbd8b44ce9929a3b9ef
author Josef Bacik <josef@redhat.com> 1338493797 -0400
committer Chris Mason <chris.mason@oracle.com> 1339723752 -0400

Btrfs: wake up transaction waiters when aborting a transaction

I was getting lots of hung tasks and a NULL pointer dereference because we
are not cleaning up the transaction properly when it aborts.  First we need
to reset the running_transaction to NULL so we don't get a bad dereference
for any start_transaction callers after this.  Also we cannot rely on
waitqueue_active() since it's just a list_empty(), so just call wake_up()
directly since that will do the barrier for us and such.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>