linux-kernel - Re: [PATCH v3] x86/vdso: Handle clock_gettime(CLOCK

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Message-ID: <alpine.DEB.2.21.1809101235150.1402@nanos.tec.linutronix.de>
Date:   Mon, 10 Sep 2018 12:38:07 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Andy Lutomirski <luto@...nel.org>
cc:     Matt Rickard <matt@...trans.com.au>,
        Florian Weimer <fweimer@...hat.com>,
        Stephen Boyd <sboyd@...nel.org>,
        John Stultz <john.stultz@...aro.org>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] x86/vdso: Handle clock_gettime(CLOCK_TAI) in vDSO

On Sun, 9 Sep 2018, Thomas Gleixner wrote:
>  #ifdef BUILD_VDSO32_64
>  typedef u64 gtod_long_t;
>  #else
>  typedef unsigned long gtod_long_t;
>  #endif
> +
> +struct vgtod_ts {
> +	gtod_long_t	sec;

and actually this wants to become u64 unconditionally as we need to provide
the full seconds even on 32bit for the upcoming y2038 support. We still
have to truncate it for the current 32bit interface, but the core code
can be made ready now.

Thanks,

	tglx