1 /*
2 * From lib/bitmap.c
3 * Helper functions for bitmap.h.
4 *
5 * This source code is licensed under the GNU General Public License,
6 * Version 2. See the file COPYING for more details.
7 */
8 #include <linux/bitmap.h>
9
__bitmap_weight(const unsigned long * bitmap,int bits)10 int __bitmap_weight(const unsigned long *bitmap, int bits)
11 {
12 int k, w = 0, lim = bits/BITS_PER_LONG;
13
14 for (k = 0; k < lim; k++)
15 w += hweight_long(bitmap[k]);
16
17 if (bits % BITS_PER_LONG)
18 w += hweight_long(bitmap[k] & BITMAP_LAST_WORD_MASK(bits));
19
20 return w;
21 }
22
__bitmap_or(unsigned long * dst,const unsigned long * bitmap1,const unsigned long * bitmap2,int bits)23 void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
24 const unsigned long *bitmap2, int bits)
25 {
26 int k;
27 int nr = BITS_TO_LONGS(bits);
28
29 for (k = 0; k < nr; k++)
30 dst[k] = bitmap1[k] | bitmap2[k];
31 }
32