From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754376AbYADOsB (ORCPT ); Fri, 4 Jan 2008 09:48:01 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752329AbYADOrx (ORCPT ); Fri, 4 Jan 2008 09:47:53 -0500 Received: from mgw2.diku.dk ([130.225.96.92]:52767 "EHLO mgw2.diku.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752015AbYADOrw (ORCPT ); Fri, 4 Jan 2008 09:47:52 -0500 Date: Fri, 4 Jan 2008 15:47:24 +0100 (MET) From: Julia Lawall To: per.liden@ericsson.com, jon.maloy@ericsson.com, allan.stephens@windriver.com, tipc-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: /net/tipc/port.c: Use tipc_port_unlock Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Julia Lawall The file net/tipc/port.c takes a lock using the function tipc_port_lock and then releases the lock sometimes using tipc_port_unlock and sometimes using spin_unlock_bh(p_ptr->publ.lock). tipc_port_unlock simply does the spin_unlock_bh, but it seems cleaner to use it everywhere. The problem was fixed using the following semantic patch. (http://www.emn.fr/x-info/coccinelle/) // @@ struct port *p_ptr; @@ p_ptr = tipc_port_lock(...) ... ( p_ptr = tipc_port_lock(...); | ?- spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); ) // Signed-off-by: Julia Lawall --- diff -u -p a/net/tipc/port.c b/net/tipc/port.c --- a/net/tipc/port.c 2008-01-01 10:43:55.000000000 +0100 +++ b/net/tipc/port.c 2008-01-04 10:51:05.000000000 +0100 @@ -340,7 +340,7 @@ int tipc_portunreliable(u32 ref, unsigne if (!p_ptr) return -EINVAL; *isunreliable = port_unreliable(p_ptr); - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); return TIPC_OK; } @@ -369,7 +369,7 @@ int tipc_portunreturnable(u32 ref, unsig if (!p_ptr) return -EINVAL; *isunrejectable = port_unreturnable(p_ptr); - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); return TIPC_OK; } @@ -843,7 +843,7 @@ static void port_dispatcher_sigh(void *d u32 peer_port = port_peerport(p_ptr); u32 peer_node = port_peernode(p_ptr); - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); if (unlikely(!connected)) { if (unlikely(published)) goto reject; @@ -867,7 +867,7 @@ static void port_dispatcher_sigh(void *d case TIPC_DIRECT_MSG:{ tipc_msg_event cb = up_ptr->msg_cb; - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); if (unlikely(connected)) goto reject; if (unlikely(!cb)) @@ -882,7 +882,7 @@ static void port_dispatcher_sigh(void *d case TIPC_NAMED_MSG:{ tipc_named_msg_event cb = up_ptr->named_msg_cb; - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); if (unlikely(connected)) goto reject; if (unlikely(!cb)) @@ -913,7 +913,7 @@ err: u32 peer_port = port_peerport(p_ptr); u32 peer_node = port_peernode(p_ptr); - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); if (!connected || !cb) break; if (msg_origport(msg) != peer_port) @@ -929,7 +929,7 @@ err: case TIPC_DIRECT_MSG:{ tipc_msg_err_event cb = up_ptr->err_cb; - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); if (connected || !cb) break; skb_pull(buf, msg_hdr_sz(msg)); @@ -942,7 +942,7 @@ err: tipc_named_msg_err_event cb = up_ptr->named_err_cb; - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); if (connected || !cb) break; dseq.type = msg_nametype(msg); @@ -1107,7 +1107,7 @@ int tipc_portimportance(u32 ref, unsigne if (!p_ptr) return -EINVAL; *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr); - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); return TIPC_OK; } @@ -1122,7 +1122,7 @@ int tipc_set_portimportance(u32 ref, uns if (!p_ptr) return -EINVAL; msg_set_importance(&p_ptr->publ.phdr, (u32)imp); - spin_unlock_bh(p_ptr->publ.lock); + tipc_port_unlock(p_ptr); return TIPC_OK; }