Covert rte_atomic usages to compiler atomic built-ins in
rcu_perf testcases.

Signed-off-by: Joyce Kong <redacted>
Reviewed-by: Ruifeng Wang <redacted>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
---
  app/test/test_rcu_qsbr_perf.c | 98 +++++++++++++++++------------------
  1 file changed, 49 insertions(+), 49 deletions(-)

diff --git a/app/test/test_rcu_qsbr_perf.c b/app/test/test_rcu_qsbr_perf.c
index 3017e71120..cf7b158d22 100644
--- a/app/test/test_rcu_qsbr_perf.c
+++ b/app/test/test_rcu_qsbr_perf.c

@@ -30,8 +30,8 @@ static volatile uint32_t thr_id;
  static struct rte_rcu_qsbr *t[RTE_MAX_LCORE];
  static struct rte_hash *h;
  static char hash_name[8];
-static rte_atomic64_t updates, checks;
-static rte_atomic64_t update_cycles, check_cycles;
+static uint64_t updates, checks;
+static uint64_t update_cycles, check_cycles;
  
  /* Scale down results to 1000 operations to support lower
   * granularity clocks.

@@ -81,8 +81,8 @@ test_rcu_qsbr_reader_perf(void *arg)
  	}
  
  	cycles = rte_rdtsc_precise() - begin;
-	rte_atomic64_add(&update_cycles, cycles);
-	rte_atomic64_add(&updates, loop_cnt);
+	__atomic_fetch_add(&update_cycles, cycles, __ATOMIC_RELAXED);
+	__atomic_fetch_add(&updates, loop_cnt, __ATOMIC_RELAXED);