From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Gortmaker Subject: [PATCH net-next 1/4] tipc: Minor optimizations to name table translation code Date: Fri, 3 Sep 2010 14:33:39 -0400 Message-ID: <1283538822-25718-1-git-send-email-paul.gortmaker@windriver.com> Cc: netdev@vger.kernel.org, allan.stephens@windriver.com To: davem@davemloft.net Return-path: Received: from mail.windriver.com ([147.11.1.11]:54530 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753893Ab0ICSdp (ORCPT ); Fri, 3 Sep 2010 14:33:45 -0400 Sender: netdev-owner@vger.kernel.org List-ID: From: Allan Stephens 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 Signed-off-by: Paul Gortmaker --- net/tipc/name_table.c | 4 +--- net/tipc/port.c | 4 ++-- 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c index d504e49..c13c2c7 100644 --- a/net/tipc/name_table.c +++ b/net/tipc/name_table.c @@ -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 @@ found: } spin_unlock_bh(&seq->lock); not_found: - *destnode = 0; read_unlock_bh(&tipc_nametbl_lock); return 0; } diff --git a/net/tipc/port.c b/net/tipc/port.c index ebcbc21..d760336 100644 --- a/net/tipc/port.c +++ b/net/tipc/port.c @@ -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); -- 1.7.2.1