radeon_semaphore_emit_wait
bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
if (!radeon_semaphore_emit_wait(rdev, ring, semaphore)) {
radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
radeon_semaphore_emit_wait(rdev, ringA->idx, semaphore);
radeon_semaphore_emit_wait(rdev, ringB->idx, semaphore);