AMDGPU_RESV_MEM_TRAIN
amdgpu_ttm_init_vram_resv(adev, AMDGPU_RESV_MEM_TRAIN,
amdgpu_ttm_unmark_vram_reserved(adev, AMDGPU_RESV_MEM_TRAIN);
&adev->mman.resv_region[AMDGPU_RESV_MEM_TRAIN];
if (adev->mman.resv_region[AMDGPU_RESV_MEM_TRAIN].size) {