nfs_async_inode_return_delegation
switch (nfs_async_inode_return_delegation(inode, &args->stateid)) {
int nfs_async_inode_return_delegation(struct inode *inode, const nfs4_stateid *stateid);
nfs_async_inode_return_delegation(inode, &delegation->stateid);
err = nfs_async_inode_return_delegation(inode,