[dpdk-dev,v2,01/10] mempool: silence -Wcast-align on pointer arithmetic
Commit Message
Translating from a mempool object to the mempool pointer does not break
alignment constraints. However, the compiler is unaware of this fact and
complains on -Wcast-align. This patch modifies the code to use RTE_PTR_SUB(),
thereby silencing the compiler by casting through (void *).
Acked-by: Olivier Matz <olivier.matz@6wind.com>
Signed-off-by: Cyril Chemparathy <cchemparathy@ezchip.com>
---
lib/librte_mempool/rte_mempool.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
@@ -236,15 +236,13 @@ struct rte_mempool {
*/
static inline struct rte_mempool **__mempool_from_obj(void *obj)
{
- struct rte_mempool **mpp;
unsigned off;
off = sizeof(struct rte_mempool *);
#ifdef RTE_LIBRTE_MEMPOOL_DEBUG
off += sizeof(uint64_t);
#endif
- mpp = (struct rte_mempool **)((char *)obj - off);
- return mpp;
+ return RTE_PTR_SUB(obj, off);
}
/**