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PipeFS superblock creation routine relays on SUNRPC pernet data presense, which is created on register_pernet_subsys() call in SUNRPC module init function. Registering of PipeFS filesystem prior to registering of per-net subsystem leads to races (mount of PipeFS can dereference uninitialized data). Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>