[RXRPC]: Decrease number of pointer derefs in connection.c
Decrease the number of pointer derefs in net/rxrpc/connection.c
Benefits of the patch:
- Fewer pointer dereferences should make the code slightly faster.
- Size of generated code is smaller
- improved readability
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rxrpc/connection.c b/net/rxrpc/connection.c
index 2ba14a7..0e0a455 100644
--- a/net/rxrpc/connection.c
+++ b/net/rxrpc/connection.c
@@ -220,6 +220,7 @@
{
struct rxrpc_connection *conn, *candidate = NULL;
struct list_head *_p;
+ struct sk_buff *pkt = msg->pkt;
int ret, fresh = 0;
__be32 x_epoch, x_connid;
__be16 x_port, x_servid;
@@ -229,10 +230,10 @@
_enter("%p{{%hu}},%u,%hu",
peer,
peer->trans->port,
- ntohs(msg->pkt->h.uh->source),
+ ntohs(pkt->h.uh->source),
ntohs(msg->hdr.serviceId));
- x_port = msg->pkt->h.uh->source;
+ x_port = pkt->h.uh->source;
x_epoch = msg->hdr.epoch;
x_clflag = msg->hdr.flags & RXRPC_CLIENT_INITIATED;
x_connid = htonl(ntohl(msg->hdr.cid) & RXRPC_CIDMASK);
@@ -267,7 +268,7 @@
/* fill in the specifics */
candidate->addr.sin_family = AF_INET;
candidate->addr.sin_port = x_port;
- candidate->addr.sin_addr.s_addr = msg->pkt->nh.iph->saddr;
+ candidate->addr.sin_addr.s_addr = pkt->nh.iph->saddr;
candidate->in_epoch = x_epoch;
candidate->out_epoch = x_epoch;
candidate->in_clientflag = RXRPC_CLIENT_INITIATED;
@@ -675,6 +676,7 @@
struct rxrpc_message *msg)
{
struct rxrpc_message *pmsg;
+ struct dst_entry *dst;
struct list_head *_p;
unsigned cix, seq;
int ret = 0;
@@ -710,10 +712,10 @@
call->pkt_rcv_count++;
- if (msg->pkt->dst && msg->pkt->dst->dev)
+ dst = msg->pkt->dst;
+ if (dst && dst->dev)
conn->peer->if_mtu =
- msg->pkt->dst->dev->mtu -
- msg->pkt->dst->dev->hard_header_len;
+ dst->dev->mtu - dst->dev->hard_header_len;
/* queue on the call in seq order */
rxrpc_get_message(msg);