[PATCH] eventdev: do not use zero length arrays

[PATCH] eventdev: do not use zero length arrays

[Stephen Hemminger]

Zero length array's are a GNU C extension and should be replaced
by use of flexible arrayrs. This has been fixed almost everywhere
in DPDK 24.07 but looks like some event code got missed.

Generated by devtools/cocci/zero_length_array.cocci

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/event/opdl/opdl_ring.c       | 2 +-
 drivers/event/sw/event_ring.h        | 2 +-
 lib/eventdev/rte_event_dma_adapter.h | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/event/opdl/opdl_ring.c b/drivers/event/opdl/opdl_ring.c
index 6799ec996b..60991c4b03 100644
--- a/drivers/event/opdl/opdl_ring.c
+++ b/drivers/event/opdl/opdl_ring.c
@@ -119,7 +119,7 @@ struct opdl_ring {
 	/* Stages indexed by ID */
 	struct opdl_stage *stages;
 	/* Memory for storing slot data */
-	alignas(RTE_CACHE_LINE_SIZE) uint8_t slots[0];
+	alignas(RTE_CACHE_LINE_SIZE) uint8_t slots[];
 };
 
 
diff --git a/drivers/event/sw/event_ring.h b/drivers/event/sw/event_ring.h
index 29db267b77..35931888dd 100644
--- a/drivers/event/sw/event_ring.h
+++ b/drivers/event/sw/event_ring.h
@@ -27,7 +27,7 @@ struct rob_ring {
 	uint32_t size;
 	uint32_t write_idx;
 	uint32_t read_idx;
-	alignas(RTE_CACHE_LINE_SIZE) void *ring[0];
+	alignas(RTE_CACHE_LINE_SIZE) void *ring[];
 };
 
 static inline struct rob_ring *
diff --git a/lib/eventdev/rte_event_dma_adapter.h b/lib/eventdev/rte_event_dma_adapter.h
index 768390cd30..5c480b82ff 100644
--- a/lib/eventdev/rte_event_dma_adapter.h
+++ b/lib/eventdev/rte_event_dma_adapter.h
@@ -204,7 +204,7 @@ struct rte_event_dma_adapter_op {
 	/**< Number of source segments. */
 	uint16_t nb_dst;
 	/**< Number of destination segments. */
-	struct rte_dma_sge src_dst_seg[0];
+	struct rte_dma_sge src_dst_seg[];
 	/**< Source and destination segments. */
 };
 
-- 
2.43.0

Re: [PATCH] eventdev: do not use zero length arrays

[Jerin Jacob]

On Thu, Jul 25, 2024 at 11:24 PM Stephen Hemminger
<stephen@networkplumber.org> wrote:
>
> Zero length array's are a GNU C extension and should be replaced
> by use of flexible arrayrs. This has been fixed almost everywhere
> in DPDK 24.07 but looks like some event code got missed.
>
> Generated by devtools/cocci/zero_length_array.cocci
>
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>

Applied to dpdk-next-eventdev/for-main. Thanks