__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