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#include <asm/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;

}