[PATCH net-next] net: fec: ptp: remove unused variable 'ns' in fec_time_keep()

[Zhang Changzhong]

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 <hul...@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzh...@huawei.com>
---
 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 a0c1f44..0405a39 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);
-- 
2.9.5