csum: Remove unnecessary memset in p4_csum()

No need to memset the IPv4 pseudo header to 0 as all its members will
explicitly be set. Also reorder the setting of the pseudo header to
match the order of the fields.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 3 insertions, 4 deletions

diff --git a/csum.h b/csum.h
index 19a8bc5..0d92c30 100644
--- a/csum.h
+++ b/csum.h
@@ -156,12 +156,11 @@ static inline uint16_t p4_csum(const struct ip *ip, const uint8_t *data,
 		uint16_t len;
 	} ph;
 
-	memset(&ph, 0, sizeof(ph));
-	ph.len = htons(len);
-	ph.mbz = 0;
-	ph.proto = next_proto;
 	ph.src = ip->ip_src.s_addr;
 	ph.dst = ip->ip_dst.s_addr;
+	ph.mbz = 0;
+	ph.proto = next_proto;
+	ph.len = htons(len);
 
 	vec[0].ptr = (const uint8_t *) (void *) &ph;
 	vec[0].len = sizeof(ph);