mempool: fix explicit cast to build C++ app

When DPDK is being compiled in C++ project using g++ then
'invalid conversion from' error appears. Added explicit
typecast on function return to get rid of the error.

Fixes: 6cf14ce4ce6c ("mempool: silence warning on pointer arithmetic")

Signed-off-by: Sergey Balabanov <balabanovsv@ecotelecom.ru>
Acked-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 075bcdf..8abeca9 100644 (file)
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -268,7 +268,7 @@ struct rte_mempool {
 /* return the header of a mempool object (internal) */
 static inline struct rte_mempool_objhdr *__mempool_get_header(void *obj)
 {
-       return RTE_PTR_SUB(obj, sizeof(struct rte_mempool_objhdr));
+       return (struct rte_mempool_objhdr *)RTE_PTR_SUB(obj, sizeof(struct rte_mempool_objhdr));
 }
 
 /**
@@ -290,7 +290,7 @@ static inline struct rte_mempool *rte_mempool_from_obj(void *obj)
 static inline struct rte_mempool_objtlr *__mempool_get_trailer(void *obj)
 {
        struct rte_mempool *mp = rte_mempool_from_obj(obj);
-       return RTE_PTR_ADD(obj, mp->elt_size);
+       return (struct rte_mempool_objtlr *)RTE_PTR_ADD(obj, mp->elt_size);
 }
 
 /**