> 
> > Add RCU library supporting quiescent state based memory reclamation method.
> > This library helps identify the quiescent state of the reader threads so
> > that the writers can free the memory associated with the lock less data
> > structures.
> >
> > Signed-off-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
> > Reviewed-by: Steve Capper <steve.capper@arm.com>
> > Reviewed-by: Gavin Hu <gavin.hu@arm.com>
> > Reviewed-by: Ola Liljedahl <ola.liljedahl@arm.com>
> > ---
> > --
> 
> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> 
> > 2.17.1

Actually one small thing:
while doing make all seeing the following error after patch #2:

In file included from /local/kananye1/dpdk.rcu1/app/test/test_rcu_qsbr_perf.c:8:0:
/local/kananye1/dpdk.rcu1/x86_64-native-linuxapp-gcc-aesmb/include/rte_rcu_qsbr.h: In function ārte_rcu_qsbr_thread_onlineā:
/local/kananye1/dpdk.rcu1/x86_64-native-linuxapp-gcc-aesmb/include/rte_rcu_qsbr.h:235:2: error: implicit declaration of function ārte_smp_mbā [-Werror=implicit-function-declaration]
  rte_smp_mb();
  ^~~~~~~~~~

Fixed by
--- a/lib/librte_rcu/rte_rcu_qsbr.h
+++ b/lib/librte_rcu/rte_rcu_qsbr.h
@@ -31,6 +31,7 @@ extern "C" {
 #include <rte_memory.h>
 #include <rte_lcore.h>
 #include <rte_debug.h>
+#include <rte_atomic.h>