[dpdk-dev] [PATCH v3 28/40] rte_mbuf.h: make sure RTE_MIN compares same types

Andy Green andy at warmcat.com
Thu May 10 04:48:40 CEST 2018


/projects/lagopus/src/dpdk/build/include/rte_common.h:384:2:
warning: conversion from 'int' to 'uint16_t'
{aka 'short unsigned int'} may change value [-Wconversion]
  __extension__ ({ \
  ^~~~~~~~~~~~~
/projects/lagopus/src/dpdk/build/include/rte_mbuf.h:1204:16:
note: in expansion of macro 'RTE_MIN'
  m->data_off = RTE_MIN(RTE_PKTMBUF_HEADROOM,
(uint16_t)m->buf_len);

RTE_PKTMBUF_HEADROOM is typ 128, so it doesn't make trouble.

Signed-off-by: Andy Green <andy at warmcat.com>
---
 lib/librte_mbuf/rte_mbuf.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index c214f1945..a27dbb878 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -1201,7 +1201,8 @@ rte_pktmbuf_priv_size(struct rte_mempool *mp)
  */
 static inline void rte_pktmbuf_reset_headroom(struct rte_mbuf *m)
 {
-	m->data_off = RTE_MIN(RTE_PKTMBUF_HEADROOM, (uint16_t)m->buf_len);
+	m->data_off = (uint16_t)RTE_MIN((uint16_t)RTE_PKTMBUF_HEADROOM,
+					(uint16_t)m->buf_len);
 }
 
 /**



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