1/* lib/bitmap.c pulls in at least two other files. */
2
3#include <linux/bitmap.h>
4
5void bitmap_clear(unsigned long *map, unsigned int start, int len)
6{
7	unsigned long *p = map + BIT_WORD(start);
8	const unsigned int size = start + len;
9	int bits_to_clear = BITS_PER_LONG - (start % BITS_PER_LONG);
10	unsigned long mask_to_clear = BITMAP_FIRST_WORD_MASK(start);
11
12	while (len - bits_to_clear >= 0) {
13		*p &= ~mask_to_clear;
14		len -= bits_to_clear;
15		bits_to_clear = BITS_PER_LONG;
16		mask_to_clear = ~0UL;
17		p++;
18	}
19	if (len) {
20		mask_to_clear &= BITMAP_LAST_WORD_MASK(size);
21		*p &= ~mask_to_clear;
22	}
23}
24