nfs_path
extern char *nfs_path(char **p, struct dentry *dentry,
return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
EXPORT_SYMBOL_GPL(nfs_path);
char *path = nfs_path(&limit, dentry, buffer, buflen,
devname = nfs_path(&dummy, root, page, PAGE_SIZE, 0);