EMIT_FLUSH
engine->emit_flush(request, EMIT_FLUSH);
if (mode & EMIT_FLUSH) {
ret = engine->emit_flush(rq, EMIT_FLUSH);
if (mode & EMIT_FLUSH) {
if (mode & EMIT_FLUSH) {
if (mode & EMIT_FLUSH)
#define EMIT_BARRIER (EMIT_INVALIDATE | EMIT_FLUSH)