Now, this code doesn't pass this simple test:

        atomic_t a;;
        int c = 0;
        atomic_set(&a, c);
        c = atomic_inc(&a);
        if (c != 0) {
                pr_err("c = %x &a = %p\n", c, &a);
                return 1;
        }

08:28:51.771: 26187: ERR: fd.c:36: c = 7ef47a60 &a = 0x7ef47a60

Reported-by: Mr Jenkins
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Reviewed-by: Dmitry Safonov <0x7f454c46@gmail.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>