1/*
2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
3 *
4 *   This program is free software; you can redistribute it and/or
5 *   modify it under the terms of the GNU General Public License
6 *   as published by the Free Software Foundation, version 2.
7 *
8 *   This program is distributed in the hope that it will be useful, but
9 *   WITHOUT ANY WARRANTY; without even the implied warranty of
10 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 *   NON INFRINGEMENT.  See the GNU General Public License for
12 *   more details.
13 */
14
15#include <linux/cpumask.h>
16#include <linux/ctype.h>
17#include <linux/errno.h>
18#include <linux/smp.h>
19#include <linux/export.h>
20
21/*
22 * Allow cropping out bits beyond the end of the array.
23 * Move to "lib" directory if more clients want to use this routine.
24 */
25int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits)
26{
27	unsigned a, b;
28
29	bitmap_zero(maskp, nmaskbits);
30	do {
31		if (!isdigit(*bp))
32			return -EINVAL;
33		a = simple_strtoul(bp, (char **)&bp, 10);
34		b = a;
35		if (*bp == '-') {
36			bp++;
37			if (!isdigit(*bp))
38				return -EINVAL;
39			b = simple_strtoul(bp, (char **)&bp, 10);
40		}
41		if (!(a <= b))
42			return -EINVAL;
43		if (b >= nmaskbits)
44			b = nmaskbits-1;
45		while (a <= b) {
46			set_bit(a, maskp);
47			a++;
48		}
49		if (*bp == ',')
50			bp++;
51	} while (*bp != '\0' && *bp != '\n');
52	return 0;
53}
54EXPORT_SYMBOL(bitmap_parselist_crop);
55