vsscanf
ret = vsscanf(val, fmt, ap);
__scanf(2, 0) int vsscanf(const char *, const char *, va_list);
ret = vsscanf(string, fmt, ap_copy);
EXPORT_SYMBOL(vsscanf);
i = vsscanf(buf, fmt, args);
ret = vsscanf(str, format, args);
d->ret = vsscanf(value, d->fmt, d->args);
res = vsscanf(line, fmt, ap);