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< /*$FreeBSD: head/sys/dev/em/if_em.c 150124 2005-09-14 10:28:01Z ru $*/
---
> /*$FreeBSD: head/sys/dev/em/if_em.c 150306 2005-09-19 03:10:21Z imp $*/
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< if_free(ifp);
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> #if __FreeBSD_version >= 500000
> if_free(ifp);
> #endif