+ va_list args;
+ unsigned long addr;
+ int len, is_write, size, remain, n;
+ int (*op)(unsigned long, int, void *);
+ void *arg;
+ int *res;
+
+ va_copy(args, *(va_list *)arg_ptr);
+ addr = va_arg(args, unsigned long);
+ len = va_arg(args, int);
+ is_write = va_arg(args, int);
+ op = va_arg(args, void *);
+ arg = va_arg(args, void *);
+ res = va_arg(args, int *);
+ va_end(args);
+ size = min(PAGE_ALIGN(addr) - addr, (unsigned long) len);
+ remain = len;
+
+ current->thread.fault_catcher = jmpbuf;