From: Josef Bacik <josef@redhat.com>
Date: Thu, 31 May 2012 19:49:57 +0000 (-0400)
Subject: Btrfs: wake up transaction waiters when aborting a transaction
X-Git-Tag: v3.5-rc3~18^2~16
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d7096fc3ef8360f30f228344bc564d4f97d8a158;p=pandora-kernel.git

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>
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