On Mon, 2011-08-29 at 13:23 -0700, Javier Cardona wrote:
> +static void mpp_path_flush(struct ieee80211_sub_if_data *sdata)
> +{
> + struct mesh_table *tbl;
> + struct mesh_path *mpath;
> + struct mpath_node *node;
> + struct hlist_node *p;
> + int i;
> +
> + read_lock_bh(&pathtbl_resize_lock);
> + tbl = rcu_dereference_protected(mpp_paths,
> + lockdep_is_held(pathtbl_resize_lock));
> + for_each_mesh_entry(tbl, p, node, i) {
> + mpath = node->mpath;
> + if (mpath->sdata != sdata)
> + continue;
> + spin_lock_bh(&tbl->hashwlock[i]);
> + spin_lock_bh(&mpath->state_lock);
> + call_rcu(&node->rcu, mesh_path_node_reclaim);
Why is read_lock sufficient? Why is this even a r/w lock?
johannes
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