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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Ciara Loftus <ciara.loftus@intel.com>,
	Qi Zhang <qi.z.zhang@intel.com>,
	Kevin Laatz <kevin.laatz@intel.com>,
	Xiaolong Ye <xiaolong.ye@intel.com>
Cc: Ferruh Yigit <ferruh.yigit@intel.com>, dev@dpdk.org, stable@dpdk.org
Subject: [dpdk-dev] [PATCH] net/af_xdp: do not use fixed size storage for pointer
Date: Mon,  9 Nov 2020 13:30:05 +0000
Message-ID: <20201109133005.67035-1-ferruh.yigit@intel.com> (raw)

'uint64_t' is used to hold the pointer, for 32-bits build this
assumption is wrong and giving following build error:

rte_eth_af_xdp.c: In function ‘xdp_umem_configure’:
    error: cast to pointer from integer of different size
  970 |   base_addr = (void *)get_base_addr(mb_pool, &align);
      |               ^

Replacing the 'uint64_t' return type of the 'get_base_addr()' to the
Although not sure if the overall logic supports the 32-bits, using
'uintptr_t' should be safe both for 64/32 bits.

Fixes: d8a210774e1d ("net/af_xdp: support unaligned umem chunks")
Cc: stable@dpdk.org

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>


Hi Ciara,

I am not sure if 32-bit is supported for the af_xdp, but even not does
this change make sense for the 64-bits?
 drivers/net/af_xdp/rte_eth_af_xdp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/af_xdp/rte_eth_af_xdp.c b/drivers/net/af_xdp/rte_eth_af_xdp.c
index 4076ff797c..2c7892bd7e 100644
--- a/drivers/net/af_xdp/rte_eth_af_xdp.c
+++ b/drivers/net/af_xdp/rte_eth_af_xdp.c
@@ -910,13 +910,13 @@ eth_link_update(struct rte_eth_dev *dev __rte_unused,
-static inline uint64_t get_base_addr(struct rte_mempool *mp, uint64_t *align)
+static inline uintptr_t get_base_addr(struct rte_mempool *mp, uint64_t *align)
 	struct rte_mempool_memhdr *memhdr;
-	uint64_t memhdr_addr, aligned_addr;
+	uintptr_t memhdr_addr, aligned_addr;
 	memhdr = STAILQ_FIRST(&mp->mem_list);
-	memhdr_addr = (uint64_t)memhdr->addr;
+	memhdr_addr = (uintptr_t)memhdr->addr;
 	aligned_addr = memhdr_addr & ~(getpagesize() - 1);
 	*align = memhdr_addr - aligned_addr;

             reply	other threads:[~2020-11-09 13:30 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-09 13:30 Ferruh Yigit [this message]
2020-11-09 18:00 ` Loftus, Ciara
2020-11-11 13:25   ` Ferruh Yigit

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