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tipc: Minor optimizations to name table translation code

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Optimizes TIPC's name table translation code to avoid unnecessary
manipulation of the node address field of the resulting port id when
name translation fails.  This change is possible because a valid port
id cannot have a reference field of zero, so examining the reference
only is sufficient to determine if the translation was successful.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Allan Stephens 2010-09-03 08:33:39 +00:00 committed by David S. Miller
parent dcfc5d787a
commit 5d9c54c1e9
2 changed files with 3 additions and 5 deletions
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4
net/tipc/name_table.c
View File

@ -613,8 +613,7 @@ struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
}
/*
* tipc_nametbl_translate(): Translate tipc_name -> tipc_portid.
* Very time-critical.
* tipc_nametbl_translate - translate name to port id
*
* Note: on entry 'destnode' is the search domain used during translation;
* on exit it passes back the node address of the matching port (if any)
@ -685,7 +684,6 @@ u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
}
spin_unlock_bh(&seq->lock);
not_found:
*destnode = 0;
read_unlock_bh(&tipc_nametbl_lock);
return 0;
}

4
net/tipc/port.c
View File

@ -1464,7 +1464,7 @@ int tipc_forward2name(u32 ref,
msg_set_destnode(msg, destnode);
msg_set_destport(msg, destport);
if (likely(destport || destnode)) {
if (likely(destport)) {
p_ptr->sent++;
if (likely(destnode == tipc_own_addr))
return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
@ -1542,7 +1542,7 @@ int tipc_forward_buf2name(u32 ref,
skb_push(buf, LONG_H_SIZE);
skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
msg_dbg(buf_msg(buf),"PREP:");
if (likely(destport || destnode)) {
if (likely(destport)) {
p_ptr->sent++;
if (destnode == tipc_own_addr)
return tipc_port_recv_msg(buf);