linux-kernel - [PATCH] fs: Use RCU_INIT

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Message-Id: <1395600151-8911-1-git-send-email-monamagarwal123@gmail.com>
Date:	Mon, 24 Mar 2014 00:12:31 +0530
From:	Monam Agarwal <monamagarwal123@...il.com>
To:	bcrl@...ck.org, viro@...iv.linux.org.uk, linux-aio@...ck.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fs: Use RCU_INIT_POINTER(x, NULL) in aio.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/aio.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/aio.c b/fs/aio.c
index 062a5f6..c3d3eb6 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -775,7 +775,7 @@ void exit_aio(struct mm_struct *mm)
 		do {
 			if (!table || i >= table->nr) {
 				rcu_read_unlock();
-				rcu_assign_pointer(mm->ioctx_table, NULL);
+				RCU_INIT_POINTER(mm->ioctx_table, NULL);
 				if (table)
 					kfree(table);
 				return;
-- 
1.7.9.5

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