tree 61ac70f49e793494dee1196dae55ac0c19036410
parent 3f303103b884ca577908d3e5c0650ad12e40c586
author Weston Andros Adamson <dros@netapp.com> 1306892810 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1308151382 -0400

NFS: fix umount of pnfs filesystems

Unmounting a pnfs filesystem hangs using filelayout and possibly others.
This fixes the use of the rcu protected node by making use of a new 'tmpnode'
for the temporary purge list. Also, the spinlock shouldn't be held when calling
synchronize_rcu().

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>