linux-kernel - [PATCH] kernel: Use RCU_INIT_POINTER(x, NULL) in tracepoint.c

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Date:	Mon, 24 Mar 2014 00:39:08 +0530
From:	Monam Agarwal <monamagarwal123@...il.com>
To:	mathieu.desnoyers@...icios.com, rostedt@...dmis.org,
	keun-o.park@...driver.com, linux-kernel@...r.kernel.org
Subject: [PATCH] kernel: Use RCU_INIT_POINTER(x, NULL) in tracepoint.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>
---
 kernel/tracepoint.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 031cc56..72dfa96 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -291,7 +291,7 @@ static void disable_tracepoint(struct tracepoint *elem)
 
 	if (static_key_enabled(&elem->key))
 		static_key_slow_dec(&elem->key);
-	rcu_assign_pointer(elem->funcs, NULL);
+	RCU_INIT_POINTER(elem->funcs, NULL);
 }
 
 /**
-- 
1.7.9.5

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