forked from Minki/linux
22 lines
482 B
C
22 lines
482 B
C
|
/*
|
||
|
|
* From lib/bitmap.c
|
||
|
|
* Helper functions for bitmap.h.
|
||
|
|
*
|
||
|
|
* This source code is licensed under the GNU General Public License,
|
||
|
|
* Version 2. See the file COPYING for more details.
|
||
|
|
*/
|
||
|
|
#include <linux/bitmap.h>
|
||
|
|
|
||
|
|
int __bitmap_weight(const unsigned long *bitmap, int bits)
|
||
|
|
{
|
||
|
|
int k, w = 0, lim = bits/BITS_PER_LONG;
|
||
|
|
|
||
|
|
for (k = 0; k < lim; k++)
|
||
|
|
w += hweight_long(bitmap[k]);
|
||
|
|
|
||
|
|
if (bits % BITS_PER_LONG)
|
||
|
|
w += hweight_long(bitmap[k] & BITMAP_LAST_WORD_MASK(bits));
|
||
|
|
|
||
|
|
return w;
|
||
|
|
}
|