LXR linux/arch/tile/lib/cpumask.c

   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