Commit d34a1666 authored Jun 14, 2010 by Paul E. McKenney

net: convert to rcu_dereference_index_check()



The task_cls_classid() function applies rcu_dereference() to integers,
which does not work with the shiny new sparse-based checking in
rcu_dereference().  This commit therefore moves to the new RCU API
rcu_dereference_index_check().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>

parent 763008c4

include/net/cls_cgroup.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -45,7 +45,8 @@ static inline u32 task_cls_classid(struct task_struct *p)
		return 0;

		rcu_read_lock();
		id = rcu_dereference(net_cls_subsys_id);
		id = rcu_dereference_index_check(net_cls_subsys_id,
		rcu_read_lock_held());
		if (id >= 0)
		classid = container_of(task_subsys_state(p, id),
		struct cgroup_cls_state, css)->classid;