linux-kernel - [PATCH 3.16 217/294] Input: joystick

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Date:   Mon, 06 Nov 2017 23:03:02 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Mark Brown" <broonie@...aro.org>,
        "Dmitry Torokhov" <dmitry.torokhov@...il.com>,
        "Arnd Bergmann" <arnd@...db.de>
Subject: [PATCH 3.16 217/294] Input: joystick - use get_cycles on ARMv8

3.16.50-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Brown <broonie@...aro.org>

commit a6b48699ae50ccce700506ced863ba1f5ce2af11 upstream.

As with ARM the ARMv8 architecture provides a cycle counter which can be
used to provide a high resolution time for the joystick driver and
silence the build warning that results from not having a precise timer
on ARMv8, making allmodconfig and allyesconfig quieter.

Signed-off-by: Mark Brown <broonie@...aro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/input/joystick/analog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/input/joystick/analog.c
+++ b/drivers/input/joystick/analog.c
@@ -158,7 +158,7 @@ static unsigned int get_time_pit(void)
 #define GET_TIME(x)	rdtscl(x)
 #define DELTA(x,y)	((y)-(x))
 #define TIME_NAME	"TSC"
-#elif defined(__alpha__) || defined(CONFIG_MN10300) || defined(CONFIG_ARM) || defined(CONFIG_TILE)
+#elif defined(__alpha__) || defined(CONFIG_MN10300) || defined(CONFIG_ARM) || defined(CONFIG_ARM64) || defined(CONFIG_TILE)
 #define GET_TIME(x)	do { x = get_cycles(); } while (0)
 #define DELTA(x,y)	((y)-(x))
 #define TIME_NAME	"get_cycles"