OPREGION_RVDA
if (remaining && pos < OPREGION_RVDA) {
size_t bytes = min_t(size_t, remaining, OPREGION_RVDA - pos);
if (remaining && pos < OPREGION_RVDA + sizeof(__le64)) {
OPREGION_RVDA + sizeof(__le64) - pos);
(u8 *)&rvda + (pos - OPREGION_RVDA),
OPREGION_RVDA));