[PATCH] ring: compilation fix with GCC-12

[Amit Prakash Shukla]

GCC 12 raises the following warning:

In function '__rte_ring_dequeue_elems_128',
    inlined from '__rte_ring_dequeue_elems' at
		../lib/ring/rte_ring_elem_pvt.h:262:3,
    inlined from '__rte_ring_do_hts_dequeue_elem' at
		../lib/ring/rte_ring_hts_elem_pvt.h:237:3,
    inlined from 'rte_ring_mc_hts_dequeue_bulk_elem' at
		../lib/ring/rte_ring_hts.h:83:9,
    inlined from 'rte_ring_dequeue_bulk_elem' at
		../lib/ring/rte_ring_elem.h:391:10,
    inlined from 'rte_ring_dequeue_elem' at
		../lib/ring/rte_ring_elem.h:476:9,
    inlined from 'rte_ring_dequeue' at
		../lib/ring/rte_ring.h:463:9,
    inlined from 'rxa_intr_ring_dequeue' at
		../lib/eventdev/rte_event_eth_rx_adapter.c:1196:10:
../lib/ring/rte_ring_elem_pvt.h:234:25: error: 'memcpy' writing
	32 bytes into a region of size 8 overflows the destination
	[-Werror=stringop-overflow=]
  234 |    memcpy((void *)(obj + i), (void *)(ring + idx), 32);
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Replacing memcpy with rte_memcpy fixes the GCC-12 compilation issue.
Also it would be better to change to rte_memcpy as the function is
called in fastpath.

Bugzilla ID: 1062
Fixes: 1fc73390bcf5 ("ring: refactor exported headers")
Cc: stable at dpdk.org

Signed-off-by: Amit Prakash Shukla <amitprakashs at marvell.com>
---
 lib/ring/rte_ring_elem_pvt.h | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/lib/ring/rte_ring_elem_pvt.h b/lib/ring/rte_ring_elem_pvt.h
index 83788c56e6..3d85b13333 100644
--- a/lib/ring/rte_ring_elem_pvt.h
+++ b/lib/ring/rte_ring_elem_pvt.h
@@ -10,6 +10,8 @@
 #ifndef _RTE_RING_ELEM_PVT_H_
 #define _RTE_RING_ELEM_PVT_H_
 
+#include <rte_memcpy.h>
+
 static __rte_always_inline void
 __rte_ring_enqueue_elems_32(struct rte_ring *r, const uint32_t size,
 		uint32_t idx, const void *obj_table, uint32_t n)
@@ -97,20 +99,20 @@ __rte_ring_enqueue_elems_128(struct rte_ring *r, uint32_t prod_head,
 	const rte_int128_t *obj = (const rte_int128_t *)obj_table;
 	if (likely(idx + n <= size)) {
 		for (i = 0; i < (n & ~0x1); i += 2, idx += 2)
-			memcpy((void *)(ring + idx),
+			rte_memcpy((void *)(ring + idx),
 				(const void *)(obj + i), 32);
 		switch (n & 0x1) {
 		case 1:
-			memcpy((void *)(ring + idx),
+			rte_memcpy((void *)(ring + idx),
 				(const void *)(obj + i), 16);
 		}
 	} else {
 		for (i = 0; idx < size; i++, idx++)
-			memcpy((void *)(ring + idx),
+			rte_memcpy((void *)(ring + idx),
 				(const void *)(obj + i), 16);
 		/* Start at the beginning */
 		for (idx = 0; i < n; i++, idx++)
-			memcpy((void *)(ring + idx),
+			rte_memcpy((void *)(ring + idx),
 				(const void *)(obj + i), 16);
 	}
 }
@@ -231,17 +233,17 @@ __rte_ring_dequeue_elems_128(struct rte_ring *r, uint32_t prod_head,
 	rte_int128_t *obj = (rte_int128_t *)obj_table;
 	if (likely(idx + n <= size)) {
 		for (i = 0; i < (n & ~0x1); i += 2, idx += 2)
-			memcpy((void *)(obj + i), (void *)(ring + idx), 32);
+			rte_memcpy((void *)(obj + i), (void *)(ring + idx), 32);
 		switch (n & 0x1) {
 		case 1:
-			memcpy((void *)(obj + i), (void *)(ring + idx), 16);
+			rte_memcpy((void *)(obj + i), (void *)(ring + idx), 16);
 		}
 	} else {
 		for (i = 0; idx < size; i++, idx++)
-			memcpy((void *)(obj + i), (void *)(ring + idx), 16);
+			rte_memcpy((void *)(obj + i), (void *)(ring + idx), 16);
 		/* Start at the beginning */
 		for (idx = 0; i < n; i++, idx++)
-			memcpy((void *)(obj + i), (void *)(ring + idx), 16);
+			rte_memcpy((void *)(obj + i), (void *)(ring + idx), 16);
 	}
 }
 
-- 
2.25.1