From: Andreea-Cristina Bernat <bernat.ada@gmail.com>
Date: Sun, 17 Aug 2014 10:21:45 +0000 (+0300)
Subject: bonding: Replace rcu_dereference() with rcu_access_pointer()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b5091b552a9fd7c45f9f8f4efa23bc78af0553cd;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

bonding: Replace rcu_dereference() with rcu_access_pointer()

This "rcu_dereference()" call is used directly in a condition.
Since its return value is never dereferenced it is recommended to use
"rcu_access_pointer()" instead of "rcu_dereference()".
Therefore, this patch makes this replacement.

The following Coccinelle semantic patch was used for solving it:
@@
@@

(
 if(
 (<+...
- rcu_dereference
+ rcu_access_pointer
  (...)
 ...+>)) {...}
|
 while(
 (<+...
- rcu_dereference
+ rcu_access_pointer
  (...)
  ...+>)) {...}
)

Signed-off-by: Andreea-Cristina Bernat <bernat.ada@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 95dd1f58c260..73c21e233131 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -1388,7 +1388,7 @@ static int bond_do_alb_xmit(struct sk_buff *skb, struct bonding *bond,
 	}
 
 	if (tx_slave && bond_slave_can_tx(tx_slave)) {
-		if (tx_slave != rcu_dereference(bond->curr_active_slave)) {
+		if (tx_slave != rcu_access_pointer(bond->curr_active_slave)) {
 			ether_addr_copy(eth_data->h_source,
 					tx_slave->dev->dev_addr);
 		}