Re: [B.A.T.M.A.N.] [PATCH maint] batman-adv: Modify neigh_list only with rcu-list functions

On Thu, Sep 29, 2016 at 05:22:58PM +0200, Sven Eckelmann wrote:

The batadv_hard_iface::neigh_list is accessed via rcu based primitives. Thus all operations done on it have to fulfill the requirements by RCU. So using non-RCU mechanisms like hlist_add_head is not allowed because it misses the barriers required to protect concurrent readers when accessing the data behind the pointer.

Fixes: fed2826b490c ("batman-adv: add list of unique single hop neighbors per hard-interface") Signed-off-by: Sven Eckelmann sven.eckelmann@open-mesh.com

Acked-by: Linus Lüssing linus.luessing@c0d3.blue