__HYPERCALL_1PARAM  121 arch/x86/include/asm/xen/hypercall.h #define __HYPERCALL_2PARAM	__HYPERCALL_1PARAM, "+r" (__arg2)
__HYPERCALL_1PARAM  161 arch/x86/include/asm/xen/hypercall.h 		      : __HYPERCALL_1PARAM				\