From: Andreea-Cristina Bernat <bernat.ada@gmail.com>
Date: Thu, 16 Mar 2017 16:27:45 +0000 (+0000)
Subject: afs: inode: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=1d7e4ebf291d3103466006926329e39aa355944f;p=openwrt%2Fstaging%2Fblogic.git

afs: inode: 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@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
---

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index ade6ec3873cf..e083e086b7ca 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);