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[dpdk-dev,v2,14/24] rte_mbuf.h: explicit cast restricting ptrdiff to uint16

Message ID 152600400491.54839.2878497528899917098.stgit@localhost.localdomain (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers show


Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Andy Green May 11, 2018, 2 a.m. UTC
warning: conversion from 'long unsigned int' to 'uint16_t'
{aka 'short unsigned int'} may change value [-Wconversion]
 #define RTE_PTR_DIFF(ptr1, ptr2) ((uintptr_t)(ptr1) -
note: in expansion of macro 'RTE_PTR_DIFF'
  *buf_len = RTE_PTR_DIFF(shinfo, buf_addr);

Signed-off-by: Andy Green <andy@warmcat.com>
 lib/librte_mbuf/rte_mbuf.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index a27dbb878..0580ec8a0 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -1358,7 +1358,7 @@  rte_pktmbuf_ext_shinfo_init_helper(void *buf_addr, uint16_t *buf_len,
 	shinfo->fcb_opaque = fcb_opaque;
 	rte_mbuf_ext_refcnt_set(shinfo, 1);
-	*buf_len = RTE_PTR_DIFF(shinfo, buf_addr);
+	*buf_len = (uint16_t)RTE_PTR_DIFF(shinfo, buf_addr);
 	return shinfo;