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 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 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
