linux-kernel - Re: [RFC PATCH v3 2/5] time: Provide y2038 safe timekeeping_inject

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Date:	Tue, 18 Nov 2014 13:05:22 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"pang.xunlei" <pang.xunlei@...aro.org>
cc:	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com,
	Alessandro Zummo <a.zummo@...ertech.it>,
	John Stultz <john.stultz@...aro.org>,
	Arnd Bergmann <arnd.bergmann@...aro.org>
Subject: Re: [RFC PATCH v3 2/5] time: Provide y2038 safe timekeeping_inject_sleeptime()
 replacement

On Tue, 18 Nov 2014, pang.xunlei wrote:

> As part of addressing "y2038 problem" for in-kernel uses, this
> patch adds timekeeping_inject_sleeptime64() using timespec64.
> 
> After this patch, timekeeping_inject_sleeptime() is deprecated
> and all its call sites will be fixed using the new interface,
> after that it can be removed.
> 
> NOTE: timekeeping_inject_sleeptime() is safe actually, but we
> want to eliminate timespec eventually, so comes this patch.

While it's safe, the change gets rid of the timespec conversion, so
it makes sense on its own.
 
> -	tmp = timespec_to_timespec64(*delta);
> -	__timekeeping_inject_sleeptime(tk, &tmp);
> +	__timekeeping_inject_sleeptime(tk, delta);

Thanks,

	tglx
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