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

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Message-Id: <7D5DB92B-5CFA-4D92-A578-51ADDAE94A0E@gmail.com>
Date:   Sun, 13 Jan 2019 20:37:34 -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: Re: [PATCH] input_event: Provide override for sparc64



> On Dec 29, 2018, at 10:35 AM, Deepa Dinamani <deepa.kernel@...il.com> wrote:
> 
> 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

Ping.


This is required for the proper functioning of the y2038 additions to input event.

-Deepa