If bpf(4) has not been compiled into the kernel, initialize the bpf interface

pointer to a zeroed, statically allocated bpf_if structure. This way the
LIST_EMPTY() macro will always return true. This allows us to remove the
additional unconditional memory reference for each packet in the fast path.

Discussed with:	sam

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/net/bpf.h b/sys/net/bpf.h
index 0782a66..487784a 100644
--- a/sys/net/bpf.h
+++ b/sys/net/bpf.h
@@ -630,7 +630,7 @@ static __inline int
 bpf_peers_present(struct bpf_if *bpf)
 {
 
-	if (bpf && !LIST_EMPTY(&bpf->bif_dlist))
+	if (!LIST_EMPTY(&bpf->bif_dlist))
 		return (1);
 	return (0);
 }