From patchwork Sun Nov 21 23:55:44 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Eckelmann X-Patchwork-Id: 552 Return-Path: Received: from mail.gmx.net (mailout-de.gmx.net [213.165.64.22]) by open-mesh.org (Postfix) with SMTP id 82DCA1545A8 for ; Mon, 22 Nov 2010 00:55:59 +0100 (CET) Received: (qmail invoked by alias); 21 Nov 2010 23:55:58 -0000 Received: from vpnclient-194-112.hrz.tu-chemnitz.de (EHLO sven-desktop.lazhur.ath.cx) [134.109.194.112] by mail.gmx.net (mp026) with SMTP; 22 Nov 2010 00:55:58 +0100 X-Authenticated: #15668376 X-Provags-ID: V01U2FsdGVkX1/4hOFWRfn4WGufNXnzsKTKXAZKqXYXjUuZQd8JaI orOtmd0eZ37hIs From: Sven Eckelmann To: greg@kroah.com Date: Mon, 22 Nov 2010 00:55:44 +0100 Message-Id: <1290383767-32602-7-git-send-email-sven.eckelmann@gmx.de> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1290383767-32602-1-git-send-email-sven.eckelmann@gmx.de> References: <1290383767-32602-1-git-send-email-sven.eckelmann@gmx.de> X-Y-GMX-Trusted: 0 Cc: b.a.t.m.a.n@lists.open-mesh.org, Marek Lindner Subject: [B.A.T.M.A.N.] [PATCH 06/29] Staging: batman-adv: use rcu callbacks when freeing batman_if X-BeenThere: b.a.t.m.a.n@lists.open-mesh.org X-Mailman-Version: 2.1.11 Precedence: list Reply-To: The list for a Better Approach To Mobile Ad-hoc Networking List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 21 Nov 2010 23:56:00 -0000 From: Marek Lindner Signed-off-by: Marek Lindner Signed-off-by: Sven Eckelmann --- drivers/staging/batman-adv/hard-interface.c | 12 ++++++++++-- drivers/staging/batman-adv/hard-interface.h | 1 - drivers/staging/batman-adv/types.h | 1 + 3 files changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/staging/batman-adv/hard-interface.c b/drivers/staging/batman-adv/hard-interface.c index 6d5b748..c2ff294 100644 --- a/drivers/staging/batman-adv/hard-interface.c +++ b/drivers/staging/batman-adv/hard-interface.c @@ -36,6 +36,15 @@ /* protect update critical side of if_list - but not the content */ static DEFINE_SPINLOCK(if_list_lock); +static void hardif_free_rcu(struct rcu_head *rcu) +{ + struct batman_if *batman_if; + + batman_if = container_of(rcu, struct batman_if, rcu); + dev_put(batman_if->net_dev); + kref_put(&batman_if->refcount, hardif_free_ref); +} + struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev) { struct batman_if *batman_if; @@ -462,9 +471,8 @@ static void hardif_remove_interface(struct batman_if *batman_if) return; batman_if->if_status = IF_TO_BE_REMOVED; - synchronize_rcu(); sysfs_del_hardif(&batman_if->hardif_obj); - kref_put(&batman_if->refcount, hardif_free_ref); + call_rcu(&batman_if->rcu, hardif_free_rcu); } void hardif_remove_interfaces(void) diff --git a/drivers/staging/batman-adv/hard-interface.h b/drivers/staging/batman-adv/hard-interface.h index 1d1cd9f..30ec3b8 100644 --- a/drivers/staging/batman-adv/hard-interface.h +++ b/drivers/staging/batman-adv/hard-interface.h @@ -47,7 +47,6 @@ static inline void hardif_free_ref(struct kref *refcount) struct batman_if *batman_if; batman_if = container_of(refcount, struct batman_if, refcount); - dev_put(batman_if->net_dev); kfree(batman_if); } diff --git a/drivers/staging/batman-adv/types.h b/drivers/staging/batman-adv/types.h index d89ec70..8f6ba1c 100644 --- a/drivers/staging/batman-adv/types.h +++ b/drivers/staging/batman-adv/types.h @@ -46,6 +46,7 @@ struct batman_if { struct kref refcount; struct packet_type batman_adv_ptype; struct net_device *soft_iface; + struct rcu_head rcu; }; /**