[dpdk-dev] [PATCH] ixgbe: Fix clang compilation issue

[Bruce Richardson <bruce.richardson@intel.com>]

Issue reported by Keith Wiles.
Clang fails with an error about a variable being used uninitialized:

  CC ixgbe_rxtx_vec.o
/home/keithw/projects/dpdk-code/org-dpdk/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c:67:30:
error: variable 'dma_addr0' is uninitialized
      when used here [-Werror,-Wuninitialized]
                        dma_addr0 = _mm_xor_si128(dma_addr0, dma_addr0);
                                                  ^~~~~~~~~

This error can be fixed by replacing the call to xor which
takes two parameters, by a call to setzero, which does not take any.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c b/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c
index 457f267..2236250 100644
--- a/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c
+++ b/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c
@@ -64,7 +64,7 @@ ixgbe_rxq_rearm(struct igb_rx_queue *rxq)
 				 RTE_IXGBE_RXQ_REARM_THRESH) < 0) {
 		if (rxq->rxrearm_nb + RTE_IXGBE_RXQ_REARM_THRESH >=
 		    rxq->nb_rx_desc) {
-			dma_addr0 = _mm_xor_si128(dma_addr0, dma_addr0);
+			dma_addr0 = _mm_setzero_si128();
 			for (i = 0; i < RTE_IXGBE_DESCS_PER_LOOP; i++) {
 				rxep[i].mbuf = &rxq->fake_mbuf;
 				_mm_store_si128((__m128i *)&rxdp[i].read,
-- 
1.9.3