tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
20/*
21 * Allow cropping out bits beyond the end of the array.
22 * Move to "lib" directory if more clients want to use this routine.
23 */
24int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits)
25{
26 unsigned a, b;
27
28 bitmap_zero(maskp, nmaskbits);
29 do {
30 if (!isdigit(*bp))
31 return -EINVAL;
32 a = simple_strtoul(bp, (char **)&bp, 10);
33 b = a;
34 if (*bp == '-') {
35 bp++;
36 if (!isdigit(*bp))
37 return -EINVAL;
38 b = simple_strtoul(bp, (char **)&bp, 10);
39 }
40 if (!(a <= b))
41 return -EINVAL;
42 if (b >= nmaskbits)
43 b = nmaskbits-1;
44 while (a <= b) {
45 set_bit(a, maskp);
46 a++;
47 }
48 if (*bp == ',')
49 bp++;
50 } while (*bp != '\0' && *bp != '\n');
51 return 0;
52}