amdgpu_sdma_get_index_from_ring
r = amdgpu_sdma_get_index_from_ring(ring, &index);
int amdgpu_sdma_get_index_from_ring(struct amdgpu_ring *ring, uint32_t *index);
amdgpu_sdma_get_index_from_ring(ring, &index);
amdgpu_sdma_get_index_from_ring(ring, &index);
amdgpu_sdma_get_index_from_ring(ring, &index);
amdgpu_sdma_get_index_from_ring(ring, &index);
amdgpu_sdma_get_index_from_ring(ring, &index);