linux-kernel - Re: [PATCH v4 1/4] uinput: Use monotonic times for uinput timestamps.

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Message-ID: <CAK8P3a3FaN86_qOLjXGO=d4QLmX6vS5veHGcky_NJNebyMG7rw@mail.gmail.com>
Date:   Thu, 7 Dec 2017 23:24:31 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Deepa Dinamani <deepa.kernel@...il.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Hutterer <peter.hutterer@...-t.net>,
        y2038 Mailman List <y2038@...ts.linaro.org>
Subject: Re: [PATCH v4 1/4] uinput: Use monotonic times for uinput timestamps.

On Thu, Dec 7, 2017 at 7:13 PM, Deepa Dinamani <deepa.kernel@...il.com> wrote:
> struct timeval which is part of struct input_event to
> maintain the event times is not y2038 safe.
>
> Real time timestamps are also not ideal for input_event
> as this time can go backwards as noted in the patch
> a80b83b7b8 by John Stultz.
>
> The patch switches the timestamps to use monotonic time
> from realtime time. This is assuming no one is using
> absolute times from these timestamps.
>
> The structure to maintain input events will be changed
> in a different patch.
>
> Signed-off-by: Deepa Dinamani <deepa.kernel@...il.com>

Reviewed-by: Arnd Bergmann <arnd@...db.de>