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 */
bitmap_parselist_crop(const char * bp,unsigned long * maskp,int nmaskbits)25 int 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 }
54 EXPORT_SYMBOL(bitmap_parselist_crop);
55