Hi,
Here's a small patch to 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
Please consider applying.
Signed-off-by: Jesper Juhl <[email protected]>
---
net/rxrpc/connection.c | 14 ++++++++------
1 files changed, 8 insertions(+), 6 deletions(-)
orig:
text data bss dec hex filename
7146 40 4 7190 1c16 net/rxrpc/connection.o
patched:
text data bss dec hex filename
7140 40 4 7184 1c10 net/rxrpc/connection.o
--- linux-2.6.15-rc5-git1-orig/net/rxrpc/connection.c 2005-10-28 02:02:08.000000000 +0200
+++ linux-2.6.15-rc5-git1/net/rxrpc/connection.c 2005-12-08 20:29:15.000000000 +0100
@@ -220,6 +220,7 @@ int rxrpc_connection_lookup(struct rxrpc
{
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 @@ int rxrpc_connection_lookup(struct rxrpc
_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 @@ int rxrpc_connection_lookup(struct rxrpc
/* 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 @@ int rxrpc_conn_receive_call_packet(struc
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 @@ int rxrpc_conn_receive_call_packet(struc
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);
-
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