linux-kernel - [PATCH 4.20 067/117] Input: input_event

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Message-Id: <20190129113210.938813738@linuxfoundation.org>
Date:   Tue, 29 Jan 2019 12:35:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Deepa Dinamani <deepa.kernel@...il.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: [PATCH 4.20 067/117] Input: input_event - provide override for sparc64

4.20-stable review patch.  If anyone has any objections, please let me know.

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

From: Deepa Dinamani <deepa.kernel@...il.com>

commit 2e746942ebacf1565caa72cf980745e5ce297c48 upstream.

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>
Cc: stable@...r.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 include/uapi/linux/input.h |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- 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