nfs_do_refmount    99 fs/nfs/internal.h extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
nfs_do_refmount   123 fs/nfs/namespace.c 		mnt = nfs_do_refmount(nd->path.mnt, nd->path.dentry);