mempool: silence warning on pointer arithmetic

[dpdk.git] / lib / librte_mempool / rte_mempool.c

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 3cd5aab..02699a1 100644 (file)
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -136,7 +136,7 @@ mempool_add_elem(struct rte_mempool *mp, void *obj, uint32_t obj_idx,
        obj = (char *)obj + mp->header_size;
 
        /* set mempool ptr in header */
-       hdr = (struct rte_mempool_objhdr *)((char *)obj - sizeof(*hdr));
+       hdr = RTE_PTR_SUB(obj, sizeof(*hdr));
        hdr->mp = mp;
 
 #ifdef RTE_LIBRTE_MEMPOOL_DEBUG