mb_find_next_bit_test
bit = mb_find_next_bit_test(bitmap, max, bit + 1);
i = mb_find_next_bit_test(bitmap, max, 0);
i = mb_find_next_bit_test(bitmap, max, i + 1);
off = mb_find_next_bit_test(bitmap, max, off + 1);
EXPORT_SYMBOL_FOR_EXT4_TEST(mb_find_next_bit_test);
extern int mb_find_next_bit_test(void *addr, int max, int start);