[dpdk-dev] [PATCH v3 01/10] mempool: silence -Wcast-align on pointer arithmetic
Cyril Chemparathy
cchemparathy at ezchip.com
Fri Jun 19 20:57:03 CEST 2015
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 at 6wind.com>
Signed-off-by: Cyril Chemparathy <cchemparathy at ezchip.com>
---
lib/librte_mempool/rte_mempool.h | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index bc2bae0..8be040b 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -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);
}
/**
--
2.1.2
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