Merge commit 'c1326210' from nfsd/linux-next

Pull in the commit that is common to both the NFS client and server xattr
implementation from git://git.linux-nfs.org/projects/cel/cel-2.6.git nfsd-5.9

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>