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