[dpdk-dev] [PATCH 2/3] mbuf: avoid cast-align warning in pktmbuf mtod offset macro

[Eli Britstein <elibr@nvidia.com>]

In rte_pktmbuf_mtod_offset macro, there is a casting from char * to type
't', which may cause cast-align warning when using gcc flags
'-Werror -Wcast-align':

.../include/rte_mbuf_core.h:723:3: error: cast increases required alignment
    of target type [-Werror=cast-align]
  723 |  ((t)((char *)(m)->buf_addr + (m)->data_off + (o)))
      |   ^

As the code assumes correct alignment, add first a (void *) casting, to
avoid the warning.

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

Signed-off-by: Eli Britstein <elibr@nvidia.com>
---
 lib/mbuf/rte_mbuf_core.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mbuf/rte_mbuf_core.h b/lib/mbuf/rte_mbuf_core.h
index bb38d7f581..dabdeee604 100644
--- a/lib/mbuf/rte_mbuf_core.h
+++ b/lib/mbuf/rte_mbuf_core.h
@@ -720,7 +720,7 @@ struct rte_mbuf_ext_shared_info {
  *   The type to cast the result into.
  */
 #define rte_pktmbuf_mtod_offset(m, t, o)	\
-	((t)((char *)(m)->buf_addr + (m)->data_off + (o)))
+	((t)(void *)((char *)(m)->buf_addr + (m)->data_off + (o)))
 
 /**
  * A macro that points to the start of the data in the mbuf.
-- 
2.28.0.2311.g225365fb51