[PATCH v3 0/4] SUNRPC: several fixes around PipeFS objects

v3:
1) Lookup for client is performed from the beginning of the list on each PipeFS
event handling operation.

v2: 
1) Prior to calling PipeFS dentry rountines (for both type of clients - SUNPRC
and NFS) get the client and drop the list lock instead of replacing per-net
locks by mutexes.

First two pathes fixes lockdep warnings and next two - dereferencing of
released pipe data on eventfd close and in file operations.

The following series consists of:

---

Stanislav Kinsbursky (4):
      SUNRPC: release per-net clients lock before calling PipeFS dentries creation
      NFS: release per-net clients lock before calling PipeFS dentries creation
      SUNRPC: check RPC inode's pipe reference before dereferencing
      SUNRPC: move waitq from RPC pipe to RPC inode


 fs/nfs/idmap.c                     |   30 ++++++++++++---
 include/linux/sunrpc/rpc_pipe_fs.h |    2 +
 net/sunrpc/clnt.c                  |   30 ++++++++++++---
 net/sunrpc/rpc_pipe.c              |   71 +++++++++++++++++++++++-------------
 4 files changed, 93 insertions(+), 40 deletions(-)