__HYPERCALL_2PARAM  108 include/asm-x86/xen/hypercall.h #define __HYPERCALL_3PARAM	__HYPERCALL_2PARAM, "+r" (__arg3)
__HYPERCALL_2PARAM  158 include/asm-x86/xen/hypercall.h 		      : __HYPERCALL_2PARAM				\