efivar_unix_path_to_device_path
int efivar_unix_path_to_device_path(const char *path, efidp *dp);
ret = efivar_unix_path_to_device_path(path, &dp);
ret = efivar_unix_path_to_device_path(loader, &loaderdp);
ret = efivar_unix_path_to_device_path(kernel, &kerneldp);
rv = efivar_unix_path_to_device_path(walker, &dp);