Merge branch 'nfsclone'

* nfsclone:
  nfs: add missing linux/types.h
  NFS: Fix an 'unused variable' complaint when #ifndef CONFIG_NFS_V4_2
  nfs42: add NFS_IOC_CLONE_RANGE ioctl
  nfs42: respect clone_blksize
  nfs: get clone_blksize when probing fsinfo
  nfs42: add NFS_IOC_CLONE ioctl
  nfs42: add CLONE proc functions
  nfs42: add CLONE xdr functions