linux-kernel - [PATCH] fs: Use RCU_INIT_POINTER(x, NULL) in afs/inode.c

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Date:	Mon, 24 Mar 2014 00:10:44 +0530
From:	Monam Agarwal <monamagarwal123@...il.com>
To:	dhowells@...hat.com, linux-afs@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] fs: Use RCU_INIT_POINTER(x, NULL) in afs/inode.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>
---
 fs/afs/inode.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index ce25d75..7c09dfe 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -445,7 +445,7 @@ void afs_evict_inode(struct inode *inode)
 
 	mutex_lock(&vnode->permits_lock);
 	permits = vnode->permits;
-	rcu_assign_pointer(vnode->permits, NULL);
+	RCU_INIT_POINTER(vnode->permits, NULL);
 	mutex_unlock(&vnode->permits_lock);
 	if (permits)
 		call_rcu(&permits->rcu, afs_zap_permits);
-- 
1.7.9.5

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