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mbuf: silence warning on pointer arithmetic

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Translating from an mbuf element to the mbuf 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 *).

Signed-off-by: Cyril Chemparathy <cchemparathy@ezchip.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
This commit is contained in:
Cyril Chemparathy 2015-06-22 11:34:16 -07:00 committed by Thomas Monjalon
parent 6cf14ce4ce
commit 7755baae83
1 changed files with 1 additions and 7 deletions
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8
lib/librte_mbuf/rte_mbuf.h
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@ -347,13 +347,7 @@ static inline uint16_t rte_pktmbuf_priv_size(struct rte_mempool *mp);
static inline struct rte_mbuf *
rte_mbuf_from_indirect(struct rte_mbuf *mi)
{
struct rte_mbuf *md;
/* mi->buf_addr and mi->priv_size correspond to buffer and
* private size of the direct mbuf */
md = (struct rte_mbuf *)((char *)mi->buf_addr - sizeof(*mi) -
mi->priv_size);
return md;
return RTE_PTR_SUB(mi->buf_addr, sizeof(*mi) + mi->priv_size);
}
/**