1#include <linux/module.h>
 2
 3union ull_union {
 4	unsigned long long ull;
 5	struct {
 6		unsigned int high;
 7		unsigned int low;
 8	} ui;
 9};
10
11int __ucmpdi2(unsigned long long a, unsigned long long b)
12{
13	union ull_union au = {.ull = a};
14	union ull_union bu = {.ull = b};
15
16	if (au.ui.high < bu.ui.high)
17		return 0;
18	else if (au.ui.high > bu.ui.high)
19		return 2;
20	if (au.ui.low < bu.ui.low)
21		return 0;
22	else if (au.ui.low > bu.ui.low)
23		return 2;
24	return 1;
25}
26EXPORT_SYMBOL(__ucmpdi2);