/* Test case contributed by Ingo Rohloff <rohloff@in.tum.de>.
   Code distilled from Linux kernel.  */

/* Compile this program with a gcc-2.95.2 using
   "gcc -O2" and run it. The result will be that
   rx_ring[1].next == 0   (it should be == 14)
   and
   ep.skbuff[4] == 5      (it should be 0)
*/

extern void abort(void);

struct epic_rx_desc {
    unsigned int next;
};

struct epic_private {
    struct epic_rx_desc *rx_ring;
    unsigned int rx_skbuff[5];
};

static void epic_init_ring(struct epic_private *ep) {
    int i;

    for (i = 0; i < 5; i++) {
        ep->rx_ring[i].next = 10 + (i + 1) * 2;
        ep->rx_skbuff[i] = 0;
    }
    ep->rx_ring[i - 1].next = 10;
}

static int check_rx_ring[5] = {12, 14, 16, 18, 10};

int main(void) {
    struct epic_private ep;
    struct epic_rx_desc rx_ring[5];
    int i;

    for (i = 0; i < 5; i++) {
        rx_ring[i].next = 0;
        ep.rx_skbuff[i] = 5;
    }

    ep.rx_ring = rx_ring;
    epic_init_ring(&ep);

    for (i = 0; i < 5; i++) {
        if (rx_ring[i].next != check_rx_ring[i]) abort();
        if (ep.rx_skbuff[i] != 0) abort();
    }
    return 0;
}
