__HYPERCALL_ARG4REG  102 include/asm-x86/xen/hypercall.h 	register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \
__HYPERCALL_ARG4REG  126 include/asm-x86/xen/hypercall.h #define __HYPERCALL_CLOBBER3	__HYPERCALL_CLOBBER4, __HYPERCALL_ARG4REG