__HYPERCALL_ARG2REG  100 include/asm-x86/xen/hypercall.h 	register unsigned long __arg2 asm(__HYPERCALL_ARG2REG) = __arg2; \
__HYPERCALL_ARG2REG  128 include/asm-x86/xen/hypercall.h #define __HYPERCALL_CLOBBER1	__HYPERCALL_CLOBBER2, __HYPERCALL_ARG2REG