NFS: Beware when dereferencing the delegation cred
When we look up the delegation cred, we are usually doing so in conjunction with a read of the stateid, and we want to ensure that the look up is atomic with that read. Fixes: 57f188e0 ("NFSv4: nfs_update_inplace_delegation() should update delegation cred") [sfr@canb.auug.org.au: Fixed up borken Fixes: line from Trond :-)] Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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