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net: convert to rcu_dereference_index_check()

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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>
This commit is contained in:
Paul E. McKenney 2010-06-14 17:06:21 -07:00
parent 763008c435
commit d34a16661e
1 changed files with 2 additions and 1 deletions
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3
include/net/cls_cgroup.h
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@ -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;