From: Eric Dumazet <eric.duma...@gmail.com> Date: Sat, 15 Oct 2016 17:50:49 +0200
> From: Eric Dumazet <eduma...@google.com> > > After Jesper commit back in linux-3.18, we trigger a lockdep > splat in proc_create_data() while allocating memory from > pktgen_change_name(). > > This patch converts t->if_lock to a mutex, since it is now only > used from control path, and adds proper locking to pktgen_change_name() > > 1) pktgen_thread_lock to protect the outer loop (iterating threads) > 2) t->if_lock to protect the inner loop (iterating devices) > > Note that before Jesper patch, pktgen_change_name() was lacking proper > protection, but lockdep was not able to detect the problem. > > Fixes: 8788370a1d4b ("pktgen: RCU-ify "if_list" to remove lock in > next_to_run()") > Reported-by: John Sperbeck <jsperb...@google.com> > Signed-off-by: Eric Dumazet <eduma...@google.com> Applied and queued up for -stable, thanks.