No entries under HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenCL\Vendors

with old driver 398.**. I can find “HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenCL\Vendors” with value “C:\WINDOWS\System32\nvopencl.dll”. but after upgrade to 417.22, it is empty now and all OpenCL calls failed in my application. so is it by design? or it is a bug of 417.22?

thanks a lot!
jh.