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decnet: Fix compiler warning in dn_dev.c
Use offsetof() instead of home-brewed version. Based upon initial patch by Steven Whitehouse and suggestions by Ben Hutchings. Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -152,7 +152,7 @@ static struct dn_dev_parms dn_dev_list[] = {
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#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
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#define DN_DEV_PARMS_OFFSET(x) ((int) ((char *) &((struct dn_dev_parms *)0)->x))
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#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
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#ifdef CONFIG_SYSCTL
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