[PATCH v3 2/6] rcu: replace zero length array with flex array

[Tyler Retzlaff <roretzla@linux.microsoft.com>]

Zero length arrays are GNU extension. Replace with
standard flex array.

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Reviewed-by: Morten Brørup <mb@smartsharesystems.com>
Acked-by: Chengwen Feng <fengchengwen@huawei.com>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
---
 lib/rcu/rcu_qsbr_pvt.h | 2 +-
 lib/rcu/rte_rcu_qsbr.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/rcu/rcu_qsbr_pvt.h b/lib/rcu/rcu_qsbr_pvt.h
index 5fd7ca2..96d05e6 100644
--- a/lib/rcu/rcu_qsbr_pvt.h
+++ b/lib/rcu/rcu_qsbr_pvt.h
@@ -52,7 +52,7 @@ struct rte_rcu_qsbr_dq {
  */
 typedef struct {
 	uint64_t token;  /**< Token */
-	uint8_t elem[0]; /**< Pointer to user element */
+	uint8_t elem[]; /**< Pointer to user element */
 } __attribute__((__may_alias__)) __rte_rcu_qsbr_dq_elem_t;
 
 #endif /* _RTE_RCU_QSBR_PVT_H_ */
diff --git a/lib/rcu/rte_rcu_qsbr.h b/lib/rcu/rte_rcu_qsbr.h
index e7ef788..af9cbea 100644
--- a/lib/rcu/rte_rcu_qsbr.h
+++ b/lib/rcu/rte_rcu_qsbr.h
@@ -106,7 +106,7 @@ struct rte_rcu_qsbr {
 	uint32_t max_threads;
 	/**< Maximum number of threads using this QS variable */
 
-	struct rte_rcu_qsbr_cnt qsbr_cnt[0] __rte_cache_aligned;
+	struct rte_rcu_qsbr_cnt qsbr_cnt[] __rte_cache_aligned;
 	/**< Quiescent state counter array of 'max_threads' elements */
 
 	/**< Registered thread IDs are stored in a bitmap array,
-- 
1.8.3.1