drm_amdgpu_cs_chunk_ib
struct drm_amdgpu_cs_chunk_ib *chunk_ib;
struct drm_amdgpu_cs_chunk_ib *chunk_ib;
chunk_ib = (struct drm_amdgpu_cs_chunk_ib *)chunk->kdata;
struct drm_amdgpu_cs_chunk_ib ib_data;