netdev - [PATCH] net/mac80211: Use RCU_INIT

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Date:	Mon, 24 Mar 2014 00:44:47 +0530
From:	Monam Agarwal <monamagarwal123@...il.com>
To:	linville@...driver.com, johannes@...solutions.net,
	davem@...emloft.net, linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] net/mac80211: Use RCU_INIT_POINTER(x, NULL) in chan.c

This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL)

The rcu_assign_pointer() ensures that the initialization of a structure       
is carried out before storing a pointer to that structure. 
And in the case of the NULL pointer, there is no structure to initialize. 
So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL)

Signed-off-by: Monam Agarwal <monamagarwal123@...il.com>
---
 net/mac80211/chan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index bd1fd8e..b297bd3 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -392,7 +392,7 @@ static void ieee80211_unassign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
 	lockdep_assert_held(&local->chanctx_mtx);
 
 	ctx->refcount--;
-	rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
+	RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
 
 	sdata->vif.bss_conf.idle = true;
 
-- 
1.7.9.5

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