Btrfs: fix NULL pointer after aborting a transaction
authorLiu Bo <bo.li.liu@oracle.com>
Wed, 27 Feb 2013 13:28:25 +0000 (13:28 +0000)
committerJosef Bacik <jbacik@fusionio.com>
Thu, 28 Feb 2013 18:33:52 +0000 (13:33 -0500)
commitf094ac32aba3a51c00e970a2ea029339af2ca048
tree88330927384b9ff597f6330a000e463079c02846
parent3321719ed67440bba1b0c5ae19c30d640263ccc8
Btrfs: fix NULL pointer after aborting a transaction

While doing cleanup work on an aborted transaction, we've set
the global running transaction pointer to NULL _before_ waiting all
other transaction handles to finish, so others'd hit NULL pointer
crash when referencing the global running transaction pointer.

This first sets a hint to avoid new transaction handle joining, then
waits other existing handles to abort or finish so that we can safely
set the above global pointer to NULL.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
fs/btrfs/transaction.c