NFSv4.1: Replace dprintk() in pnfs_update_layout with something less buggy
Dereferencing nfsi->layout in order to read plh_flags without holding
a spin lock is bug prone. Furthermore, the dprintk() tells you nothing
about whether or not the call succeeded.
Replace it with something that tells you about whether or not a valid
layout segment was returned for the inode in question.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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