On Wednesday 15 September 2010 23:09:36 Sven Eckelmann wrote:
synchronize_rcu respective synchronize_net only waits for the rcu grace period to elapse and we may fail to finish the calls which were made to call_rcu in that time. In result the module could be unloaded during the execution of the RCU callbacks.
rcu_barrier will now wait for all outstanding RCU callbacks to finish before continuing.
Applied in revision 1794.