linux-kernel - [PATCH 3/3] Infiniband: don't use task_struct.tgid in make_cm

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Message-ID: <47DE692F.5010600@openvz.org>
Date:	Mon, 17 Mar 2008 15:50:55 +0300
From:	Pavel Emelyanov <xemul@...nvz.org>
To:	Roland Dreier <rolandd@...co.com>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>
CC:	general@...ts.openfabrics.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>
Subject: [PATCH 3/3] Infiniband: don't use task_struct.tgid in make_cm_node()

The task_struct->tgid field is about to become deprecated, due to
pid namespaces make tasks have many pids, not one. There is one
place using it left to fix in infiniband - the make_cm_node().

This function uses the task tgid just to generate a session id,
so it's perfectly safe to use appropriate wrapper - task_tgid_nr().

Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>

---

 drivers/infiniband/hw/nes/nes_cm.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 39adb26..7a06156 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -1077,7 +1077,8 @@ static struct nes_cm_node *make_cm_node(struct nes_cm_core *cm_core,
 	/* get a unique session ID , add thread_id to an upcounter to handle race */
 	atomic_inc(&cm_core->node_cnt);
 	atomic_inc(&cm_core->session_id);
-	cm_node->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
+	cm_node->session_id = (u32)(atomic_read(&cm_core->session_id) +
+			task_tgid_nr(current));
 	cm_node->conn_type = cm_info->conn_type;
 	cm_node->apbvt_set = 0;
 	cm_node->accept_pend = 0;
@@ -1606,7 +1607,8 @@ static struct nes_cm_listener *mini_cm_listen(struct nes_cm_core *cm_core,
 	atomic_inc(&cm_core->node_cnt);
 	atomic_inc(&cm_core->session_id);
 
-	listener->session_id = (u32)(atomic_read(&cm_core->session_id) + current->tgid);
+	listener->session_id = (u32)(atomic_read(&cm_core->session_id) +
+			task_tgid_nr(current));
 	listener->conn_type = cm_info->conn_type;
 	listener->backlog = cm_info->backlog;
 	listener->listener_state = NES_CM_LISTENER_ACTIVE_STATE;


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