linux-kernel - [PATCH] tcm_fc: Replace rcu_assign_pointer() with RCU_INIT

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Message-ID: <20140818120537.GA19578@ada>
Date:	Mon, 18 Aug 2014 15:05:37 +0300
From:	Andreea-Cristina Bernat <bernat.ada@...il.com>
To:	nab@...ux-iscsi.org, agrover@...hat.com,
	linux-scsi@...r.kernel.org, target-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	paulmck@...ux.vnet.ibm.com
Subject: [PATCH] tcm_fc: Replace rcu_assign_pointer() with RCU_INIT_POINTER()

The use of "rcu_assign_pointer()" is NULLing out the pointer.
According to RCU_INIT_POINTER()'s block comment:
"1.   This use of RCU_INIT_POINTER() is NULLing out the pointer"
it is better to use it instead of rcu_assign_pointer() because it has a
smaller overhead.

The following Coccinelle semantic patch was used:
@@
@@

- rcu_assign_pointer
+ RCU_INIT_POINTER
  (..., NULL)

Signed-off-by: Andreea-Cristina Bernat <bernat.ada@...il.com>
---
 drivers/target/tcm_fc/tfc_sess.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/target/tcm_fc/tfc_sess.c b/drivers/target/tcm_fc/tfc_sess.c
index 21ce508..ccee7e3 100644
--- a/drivers/target/tcm_fc/tfc_sess.c
+++ b/drivers/target/tcm_fc/tfc_sess.c
@@ -98,7 +98,7 @@ static void ft_tport_delete(struct ft_tport *tport)
 	ft_sess_delete_all(tport);
 	lport = tport->lport;
 	BUG_ON(tport != lport->prov[FC_TYPE_FCP]);
-	rcu_assign_pointer(lport->prov[FC_TYPE_FCP], NULL);
+	RCU_INIT_POINTER(lport->prov[FC_TYPE_FCP], NULL);
 
 	tpg = tport->tpg;
 	if (tpg) {
-- 
1.9.1

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