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bonding: Use RCU_INIT_POINTER() for better overhead and for sparse 

Although rcu_assign_pointer() can be used to assign a constant
NULL pointer, doing so gets you an unnecessary memory barrier and
in some circumstances, sparse warnings.  This commit therefore
changes the rcu_assign_pointer() of NULL in __bond_release_one() to
RCU_INIT_POINTER().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
This commit is contained in:
Paul E. McKenney 2013-12-09 15:19:53 -08:00
parent ac7c8e3dd2
commit 36708b89e0
1 changed files with 1 additions and 1 deletions
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2
drivers/net/bonding/bond_main.c
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@ -1763,7 +1763,7 @@ static int __bond_release_one(struct net_device *bond_dev,
}
if (all) {
rcu_assign_pointer(bond->curr_active_slave, NULL);
RCU_INIT_POINTER(bond->curr_active_slave, NULL);
} else if (oldcurrent == slave) {
/*
* Note that we hold RTNL over this sequence, so there