From: Zhang Changzhong <zhangchangzhong@huawei.com>
Date: Mon, 14 Sep 2020 21:14:24 +0800
Subject: net: fec: ptp: remove unused variable 'ns' in fec_time_keep()
Git-commit: 992bae7e429ccb847491c36f6d0e78446b55efa7
Patch-mainline: v5.10-rc1
References: jsc#SLE-16106

Fixes the following W=1 kernel build warning(s):

drivers/net/ethernet/freescale/fec_ptp.c:523:6: warning:
 variable 'ns' set but not used [-Wunused-but-set-variable]
  523 |  u64 ns;
      |      ^~

After commit 6605b730c061 ("FEC: Add time stamping code and a PTP
hardware clock"), variable 'ns' is never used in fec_time_keep(),
so removing it to avoid build warning.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
 drivers/net/ethernet/freescale/fec_ptp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c
index a0c1f4410306..0405a3975f3f 100644
--- a/drivers/net/ethernet/freescale/fec_ptp.c
+++ b/drivers/net/ethernet/freescale/fec_ptp.c
@@ -520,13 +520,12 @@ static void fec_time_keep(struct work_struct *work)
 {
 	struct delayed_work *dwork = to_delayed_work(work);
 	struct fec_enet_private *fep = container_of(dwork, struct fec_enet_private, time_keep);
-	u64 ns;
 	unsigned long flags;
 
 	mutex_lock(&fep->ptp_clk_mutex);
 	if (fep->ptp_clk_on) {
 		spin_lock_irqsave(&fep->tmreg_lock, flags);
-		ns = timecounter_read(&fep->tc);
+		timecounter_read(&fep->tc);
 		spin_unlock_irqrestore(&fep->tmreg_lock, flags);
 	}
 	mutex_unlock(&fep->ptp_clk_mutex);