From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754303AbbEKQmB (ORCPT ); Mon, 11 May 2015 12:42:01 -0400 Received: from mail-qk0-f179.google.com ([209.85.220.179]:35475 "EHLO mail-qk0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754195AbbEKQly (ORCPT ); Mon, 11 May 2015 12:41:54 -0400 From: Tejun Heo To: davem@davemloft.net Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, penguin-kernel@I-love.SAKURA.ne.jp, sd@queasysnail.net, Tejun Heo Subject: [PATCH 3/4] netconsole: make all dynamic netconsoles share a mutex Date: Mon, 11 May 2015 12:41:33 -0400 Message-Id: <1431362494-9874-4-git-send-email-tj@kernel.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1431362494-9874-1-git-send-email-tj@kernel.org> References: <1431362494-9874-1-git-send-email-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, each dynamic netconsole_target uses its own separate mutex to synchronize the configuration operations. This patch replaces the per-netconsole_target mutexes with a single mutex - dynamic_netconsole_mutex. The reduced granularity doesn't hurt anything, the code is minutely simpler and this'd allow adding operations which should be synchronized across all dynamic netconsoles. Signed-off-by: Tejun Heo Cc: David Miller --- drivers/net/netconsole.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c index 8dd1e55..9b0c81e 100644 --- a/drivers/net/netconsole.c +++ b/drivers/net/netconsole.c @@ -105,13 +105,13 @@ struct netconsole_target { struct config_item item; #endif bool enabled; - struct mutex mutex; struct netpoll np; }; #ifdef CONFIG_NETCONSOLE_DYNAMIC static struct configfs_subsystem netconsole_subsys; +static DEFINE_MUTEX(dynamic_netconsole_mutex); static int __init dynamic_netconsole_init(void) { @@ -185,7 +185,6 @@ static struct netconsole_target *alloc_param_target(char *target_config) strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ); nt->np.local_port = 6665; nt->np.remote_port = 6666; - mutex_init(&nt->mutex); eth_broadcast_addr(nt->np.remote_mac); /* Parse parameters and setup netpoll */ @@ -562,10 +561,10 @@ static ssize_t netconsole_target_attr_store(struct config_item *item, struct netconsole_target_attr *na = container_of(attr, struct netconsole_target_attr, attr); - mutex_lock(&nt->mutex); + mutex_lock(&dynamic_netconsole_mutex); if (na->store) ret = na->store(nt, buf, count); - mutex_unlock(&nt->mutex); + mutex_unlock(&dynamic_netconsole_mutex); return ret; } @@ -604,7 +603,6 @@ static struct config_item *make_netconsole_target(struct config_group *group, strlcpy(nt->np.dev_name, "eth0", IFNAMSIZ); nt->np.local_port = 6665; nt->np.remote_port = 6666; - mutex_init(&nt->mutex); eth_broadcast_addr(nt->np.remote_mac); /* Initialize the config_item member */ -- 2.1.0