Pull NFS client bugfixes from Trond Myklebust:
- Fix an Oops in the pNFS layoutget code
- Fix a number of NFSv4 and v4.1 state recovery deadlocks and hangs due
to the interaction of the session drain lock and state management
locks.
- Remove task->tk_xprt, which was hiding a lot of RCU dereferencing
bugs
- Fix a long standing NFSv3 posix lock recovery bug.
- Revert commit 324d003b0c ("NFS: add nfs_sb_deactive_async to avoid
deadlock"). It turned out that the root cause of the deadlock was
due to interactions with the workqueues that have now been resolved.
* tag 'nfs-for-3.9-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (22 commits)
NLM: Ensure that we resend all pending blocking locks after a reclaim
umount oops when remove blocklayoutdriver first
sunrpc: silence build warning in gss_fill_context
nfs: remove kfree() redundant null checks
NFSv4.1: Don't decode skipped layoutgets
NFSv4.1: Fix bulk recall and destroy of layouts
NFSv4.1: Fix an ABBA locking issue with session and state serialisation
NFSv4: Fix a reboot recovery race when opening a file
NFSv4: Ensure delegation recall and byte range lock removal don't conflict
NFSv4: Fix up the return values of nfs4_open_delegation_recall
NFSv4.1: Don't lose locks when a server reboots during delegation return
NFSv4.1: Prevent deadlocks between state recovery and file locking
NFSv4: Allow the state manager to mark an open_owner as being recovered
SUNRPC: Add missing static declaration to _gss_mech_get_by_name
Revert "NFS: add nfs_sb_deactive_async to avoid deadlock"
SUNRPC: Nuke the tk_xprt macro
SUNRPC: Avoid RCU dereferences in the transport bind and connect code
SUNRPC: Fix an RCU dereference in xprt_reserve
SUNRPC: Pass pointers to struct rpc_xprt to the congestion window
SUNRPC: Fix an RCU dereference in xs_local_rpcbind
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