four_gb 176 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c const uint64_t four_gb = 0x100000000ULL; four_gb 187 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c size_af = max_mc_address + 1 - ALIGN(mc->fb_end + 1, four_gb); four_gb 200 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c mc->gart_start &= ~(four_gb - 1);