__arg4 116 arch/x86/include/asm/xen/hypercall.h register unsigned long __arg4 asm(__HYPERCALL_ARG4REG) = __arg4; \ __arg4 123 arch/x86/include/asm/xen/hypercall.h #define __HYPERCALL_4PARAM __HYPERCALL_3PARAM, "+r" (__arg4) __arg4 134 arch/x86/include/asm/xen/hypercall.h __HYPERCALL_3ARG(a1,a2,a3) __arg4 = (unsigned long)(a4);