linux-kernel - [PATCH] input_event: Provide override for sparc64

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Date:   Sat, 29 Dec 2018 10:35:14 -0800
From:   Deepa Dinamani <deepa.kernel@...il.com>
To:     dmitry.torokhov@...il.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        arnd@...db.de, davem@...emloft.net, y2038@...ts.linaro.org
Subject: [PATCH] input_event: Provide override for sparc64

The usec part of the timeval is defined as
__kernel_suseconds_t	tv_usec; /* microseconds */

Arnd noticed that sparc64 is the only architecture
that defines __kernel_suseconds_t as int rather than long.

This breaks the current y2038 fix for kernel as we only
access and define the timeval struct for non-kernel use cases.
But, this was hidden by an another typo in the use of __KERNEL__
qualifier.

Fix the typo, and provide an override for sparc64.

Fixes: 152194fe9c3f ("Input: extend usable life of event timestamps to 2106 on 32 bit systems")
Reported-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com>
---
 include/uapi/linux/input.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/input.h b/include/uapi/linux/input.h
index fb78f6f500f3..ffab958bc512 100644
--- a/include/uapi/linux/input.h
+++ b/include/uapi/linux/input.h
@@ -26,13 +26,17 @@
  */
 
 struct input_event {
-#if (__BITS_PER_LONG != 32 || !defined(__USE_TIME_BITS64)) && !defined(__KERNEL)
+#if (__BITS_PER_LONG != 32 || !defined(__USE_TIME_BITS64)) && !defined(__KERNEL__)
 	struct timeval time;
 #define input_event_sec time.tv_sec
 #define input_event_usec time.tv_usec
 #else
 	__kernel_ulong_t __sec;
+#ifdef CONFIG_SPARC64
+	unsigned int __usec;
+#else
 	__kernel_ulong_t __usec;
+#endif
 #define input_event_sec  __sec
 #define input_event_usec __usec
 #endif
-- 
2.17.1