This patch simplify the handling to set fields inside of struct ipv6hdr
to zero. Instead of setting some memory regions with memset to zero we
initialize the whole ipv6hdr to zero.
This is a optimization for parsing the 6lowpan header and not a bug fix.
Signed-off-by: Alexander Aring <alex.ar...@gmail.com>
---
net/ieee802154/6lowpan.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index 3b9d5f2..92429db 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -223,10 +223,6 @@ lowpan_uncompress_addr(struct sk_buff *skb, struct
in6_addr *ipaddr,
if (prefcount > 0)
memcpy(ipaddr, prefix, prefcount);
- if (prefcount + postcount < 16)
- memset(&ipaddr->s6_addr[prefcount], 0,
- 16 - (prefcount + postcount));
-
if (postcount > 0) {
memcpy(&ipaddr->s6_addr[16 - postcount], skb->data, postcount);
skb_pull(skb, postcount);
@@ -723,7 +719,7 @@ frame_err:
static int
lowpan_process_data(struct sk_buff *skb)
{
- struct ipv6hdr hdr;
+ struct ipv6hdr hdr = {};
u8 tmp, iphc0, iphc1, num_context = 0;
u8 *_saddr, *_daddr;
int err;
@@ -868,8 +864,6 @@ lowpan_process_data(struct sk_buff *skb)
hdr.priority = ((tmp >> 2) & 0x0f);
hdr.flow_lbl[0] = ((tmp << 6) & 0xC0) | ((tmp >> 2) & 0x30);
- hdr.flow_lbl[1] = 0;
- hdr.flow_lbl[2] = 0;
break;
/*
* Flow Label carried in-line
@@ -885,10 +879,6 @@ lowpan_process_data(struct sk_buff *skb)
break;
/* Traffic Class and Flow Label are elided */
case 3: /* 11b */
- hdr.priority = 0;
- hdr.flow_lbl[0] = 0;
- hdr.flow_lbl[1] = 0;
- hdr.flow_lbl[2] = 0;
break;
default:
break;
--
1.8.3.3
------------------------------------------------------------------------------
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