1#include <linux/dcache.h>
 2
 3unsigned name_to_int(const struct qstr *qstr)
 4{
 5	const char *name = qstr->name;
 6	int len = qstr->len;
 7	unsigned n = 0;
 8
 9	if (len > 1 && *name == '0')
10		goto out;
11	do {
12		unsigned c = *name++ - '0';
13		if (c > 9)
14			goto out;
15		if (n >= (~0U-9)/10)
16			goto out;
17		n *= 10;
18		n += c;
19	} while (--len > 0);
20	return n;
21out:
22	return ~0U;
23}