2 * Copyright (c) 2016-2019 François Tigeot <ftigeot@wolfpond.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #ifndef _LINUX_BITMAP_H_
28 #define _LINUX_BITMAP_H_
30 #include <linux/types.h>
31 #include <linux/bitops.h>
32 #include <linux/string.h>
33 #include <linux/kernel.h>
36 bitmap_or(unsigned long *dst, const unsigned long *src1,
37 const unsigned long *src2, unsigned int nbits)
39 if (nbits <= BITS_PER_LONG) {
42 int chunks = DIV_ROUND_UP(nbits, BITS_PER_LONG);
44 for (int i = 0;i < chunks;i++)
45 dst[i] = src1[i] | src2[i];
50 bitmap_weight(unsigned long *bitmap, unsigned int nbits)
53 unsigned int retval = 0;
55 for_each_set_bit(bit, bitmap, nbits)
60 #endif /* _LINUX_BITMAP_H_ */