userptr: Proper up-conversions
userptr: Proper up-conversions

This replaces the userptr<void> conversion hack.

bowlofstew/sv6,bowlofstew/sv6,aclements/sv6,aclements/sv6,aclements/sv6,bowlofstew/sv6,bowlofstew/sv6,aclements/sv6,bowlofstew/sv6,aclements/sv6