/* Test case contributed by Ingo Rohloff <rohloff@in.tum.de>.
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/* Test case contributed by Ingo Rohloff <rohloff@in.tum.de>.
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Code distilled from Linux kernel. */
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Code distilled from Linux kernel. */
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/* Compile this program with a gcc-2.95.2 using
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/* Compile this program with a gcc-2.95.2 using
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"gcc -O2" and run it. The result will be that
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"gcc -O2" and run it. The result will be that
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rx_ring[1].next == 0 (it should be == 14)
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rx_ring[1].next == 0 (it should be == 14)
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and
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and
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ep.skbuff[4] == 5 (it should be 0)
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ep.skbuff[4] == 5 (it should be 0)
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*/
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*/
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extern void abort(void);
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extern void abort(void);
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struct epic_rx_desc
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struct epic_rx_desc
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{
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{
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unsigned int next;
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unsigned int next;
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};
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};
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struct epic_private
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struct epic_private
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{
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{
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struct epic_rx_desc *rx_ring;
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struct epic_rx_desc *rx_ring;
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unsigned int rx_skbuff[5];
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unsigned int rx_skbuff[5];
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};
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};
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static void epic_init_ring(struct epic_private *ep)
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static void epic_init_ring(struct epic_private *ep)
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{
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{
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int i;
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int i;
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for (i = 0; i < 5; i++)
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for (i = 0; i < 5; i++)
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{
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{
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ep->rx_ring[i].next = 10 + (i+1)*2;
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ep->rx_ring[i].next = 10 + (i+1)*2;
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ep->rx_skbuff[i] = 0;
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ep->rx_skbuff[i] = 0;
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}
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}
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ep->rx_ring[i-1].next = 10;
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ep->rx_ring[i-1].next = 10;
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}
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}
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static int check_rx_ring[5] = { 12,14,16,18,10 };
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static int check_rx_ring[5] = { 12,14,16,18,10 };
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int main(void)
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int main(void)
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{
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{
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struct epic_private ep;
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struct epic_private ep;
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struct epic_rx_desc rx_ring[5];
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struct epic_rx_desc rx_ring[5];
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int i;
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int i;
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for (i=0;i<5;i++)
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for (i=0;i<5;i++)
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{
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{
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rx_ring[i].next=0;
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rx_ring[i].next=0;
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ep.rx_skbuff[i]=5;
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ep.rx_skbuff[i]=5;
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}
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}
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ep.rx_ring=rx_ring;
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ep.rx_ring=rx_ring;
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epic_init_ring(&ep);
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epic_init_ring(&ep);
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for (i=0;i<5;i++)
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for (i=0;i<5;i++)
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{
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{
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if ( rx_ring[i].next != check_rx_ring[i] ) abort();
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if ( rx_ring[i].next != check_rx_ring[i] ) abort();
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if ( ep.rx_skbuff[i] != 0 ) abort();
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if ( ep.rx_skbuff[i] != 0 ) abort();
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}
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}
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return 0;
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return 0;
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}
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}
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