[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / x86_64 / lib / bitstr_64.c

#include <linux/module.h>
#include <linux/bitops.h>

/* Find string of zero bits in a bitmap */ 
unsigned long 
find_next_zero_string(unsigned long *bitmap, long start, long nbits, int len)
{ 
	unsigned long n, end, i; 	

 again:
	n = find_next_zero_bit(bitmap, nbits, start);
	if (n == -1) 
		return -1;
	
	/* could test bitsliced, but it's hardly worth it */
	end = n+len;
	if (end >= nbits) 
		return -1; 
	for (i = n+1; i < end; i++) { 
		if (test_bit(i, bitmap)) {  
			start = i+1; 
			goto again; 
		} 
	}
	return n;
}

EXPORT_SYMBOL(find_next_zero_string);
Commit	Line	Data
1da177e4 LT	1	#include <linux/module.h>
	2	#include <linux/bitops.h>
	3
	4	/* Find string of zero bits in a bitmap */
	5	unsigned long
	6	find_next_zero_string(unsigned long *bitmap, long start, long nbits, int len)
	7	{
	8	unsigned long n, end, i;
	9
	10	again:
	11	n = find_next_zero_bit(bitmap, nbits, start);
	12	if (n == -1)
	13	return -1;
	14
	15	/* could test bitsliced, but it's hardly worth it */
	16	end = n+len;
	17	if (end >= nbits)
	18	return -1;
	19	for (i = n+1; i < end; i++) {
	20	if (test_bit(i, bitmap)) {
	21	start = i+1;
	22	goto again;
	23	}
	24	}
	25	return n;
	26	}
	27
	28	EXPORT_SYMBOL(find_next_zero_string);