mirror of https://gitee.com/openkylin/linux.git
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
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/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#include <linux/cpumask.h>
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#include <linux/ctype.h>
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#include <linux/errno.h>
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/*
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* Allow cropping out bits beyond the end of the array.
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* Move to "lib" directory if more clients want to use this routine.
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*/
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int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits)
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{
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unsigned a, b;
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bitmap_zero(maskp, nmaskbits);
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do {
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if (!isdigit(*bp))
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return -EINVAL;
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a = simple_strtoul(bp, (char **)&bp, 10);
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b = a;
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if (*bp == '-') {
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bp++;
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if (!isdigit(*bp))
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return -EINVAL;
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b = simple_strtoul(bp, (char **)&bp, 10);
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}
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if (!(a <= b))
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return -EINVAL;
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if (b >= nmaskbits)
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b = nmaskbits-1;
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while (a <= b) {
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set_bit(a, maskp);
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a++;
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}
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if (*bp == ',')
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bp++;
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} while (*bp != '\0' && *bp != '\n');
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return 0;
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}
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