linux-kernel - Re: [PATCH v2 3/4] input: Deprecate real timestamps beyond year 2106

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Message-ID: <CABeXuvra9faVw1z_0Bjwp5znO5y+6y0fSJ29AuBWt2A-cRLtrg@mail.gmail.com>
Date:   Fri, 28 Oct 2016 08:19:46 -0700
From:   Deepa Dinamani <deepa.kernel@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        y2038 Mailman List <y2038@...ts.linaro.org>
Subject: Re: [PATCH v2 3/4] input: Deprecate real timestamps beyond year 2106

On Fri, Oct 28, 2016 at 5:43 AM, Arnd Bergmann <arnd@...db.de> wrote:
> On Monday, October 17, 2016 8:27:32 PM CEST Deepa Dinamani wrote:
>> @@ -55,24 +60,24 @@ struct ff_effect_compat {
>>
>>  static inline size_t input_event_size(void)
>>  {
>> -       return (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) ?
>> -               sizeof(struct input_event_compat) : sizeof(struct input_event);
>> +       return in_compat_syscall() ? sizeof(struct raw_input_event_compat) :
>> +                                    sizeof(struct raw_input_event);
>>  }
>
> I think the COMPAT_USE_64BIT_TIME check has to stay here,
> it's needed for x32 mode on x86-64.

There is no time_t anymore in the raw_input_event structure.
The struct uses __kernel_ulong_t type.
This should take care of x32 support.

>From this cover letter:
https://www.spinics.net/lists/linux-arch/msg16356.html

I see that that the __kernel types were introduced to address the ABI
issues for x32.

-Deepa