From f751ae1cbbf955d56162be85221c1f97c53a0683 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Tue, 2 Mar 2021 07:21:40 +0100
Subject: [PATCH] tty: imx, use ms_to_ktime
This really eliminates multiplications from the assembly. I would have
thought they are optimized by inlining ktime_set, but not on x86_64 with
gcc 10.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20210302062214.29627-10-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/imx.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 8257597d034dd..3f69356937ef9 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -394,11 +394,7 @@ static void imx_uart_rts_inactive(struct imx_port *sport, u32 *ucr2)
static void start_hrtimer_ms(struct hrtimer *hrt, unsigned long msec)
{
- long sec = msec / MSEC_PER_SEC;
- long nsec = (msec % MSEC_PER_SEC) * 1000000;
- ktime_t t = ktime_set(sec, nsec);
-
- hrtimer_start(hrt, t, HRTIMER_MODE_REL);
+ hrtimer_start(hrt, ms_to_ktime(msec), HRTIMER_MODE_REL);
}
/* called with port.lock taken and irqs off */
--
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