code: def _xfail_if_pocl_gpu(device, what):
      if (
          device.platform.vendor == "The pocl project"
          and device.type & cl.device_type.GPU
      ):
          pytest.xfail(
              f"PoCL's {what} support don't work right on Nvidia GPUs, "
              "at least the Titan V, as of PoCL 1.6, 2021-01-20"
          )
  
imports: import numpy
  import numpy.linalg
  import pytest
  import pyopencl
  import pyopencl.array
  import pyopencl.cltypes
  import pyopencl.clrandom
  from pyopencl.tools import pytest_generate_tests_for_pyopencl, ImmediateAllocator, DeferredAllocator
  from pyopencl.characterize import get_pocl_version
label_desc: Use image node_id 2 for calling a global function with example usage: _xfail_if_pocl_gpu(device, what) without return types