linux-kernel - [PATCH] net: ena: remove set but not used variable 'rx

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Date:   Fri, 3 Jan 2020 20:07:01 +0800
From:   yu kuai <yukuai3@...wei.com>
To:     <netanel@...zon.com>, <saeedb@...zon.com>, <zorik@...zon.com>,
        <davem@...emloft.net>, <ast@...nel.org>, <daniel@...earbox.net>,
        <jakub.kicinski@...ronome.com>, <hawk@...nel.org>,
        <john.fastabend@...il.com>, <sameehj@...zon.com>,
        <akiyano@...zon.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <bpf@...r.kernel.org>, <yukuai3@...wei.com>, <yi.zhang@...wei.com>,
        <zhengbin13@...wei.com>
Subject: [PATCH] net: ena: remove set but not used variable 'rx_ring'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/amazon/ena/ena_netdev.c: In function
‘ena_xdp_xmit_buff’:
drivers/net/ethernet/amazon/ena/ena_netdev.c:316:19: warning:
variable ‘rx_ring’ set but not used [-Wunused-but-set-variable]

It is never used, and so can be removed.

Signed-off-by: yu kuai <yukuai3@...wei.com>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 081acf077bb5..894e8c1a8cf1 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -313,7 +313,6 @@ static int ena_xdp_xmit_buff(struct net_device *dev,
 	struct ena_com_tx_ctx ena_tx_ctx = {0};
 	struct ena_tx_buffer *tx_info;
 	struct ena_ring *xdp_ring;
-	struct ena_ring *rx_ring;
 	u16 next_to_use, req_id;
 	int rc;
 	void *push_hdr;
@@ -324,8 +323,6 @@ static int ena_xdp_xmit_buff(struct net_device *dev,
 	req_id = xdp_ring->free_ids[next_to_use];
 	tx_info = &xdp_ring->tx_buffer_info[req_id];
 	tx_info->num_of_bufs = 0;
-	rx_ring = &xdp_ring->adapter->rx_ring[qid -
-		  xdp_ring->adapter->xdp_first_ring];
 	page_ref_inc(rx_info->page);
 	tx_info->xdp_rx_page = rx_info->page;
 
-- 
2.17.2