kcsan_check_read
kcsan_check_read(addr + BIT_WORD(nr), sizeof(long));
kcsan_check_read(addr, 1);
kcsan_check_read(from, n);
kcsan_check_read(from, n);
kcsan_check_read(v, size);
kcsan_check_read(&x, sizeof(x));
kcsan_check_read(&test_struct.val[3], 0);