Re: [PATCH] time: Provide full featured jiffies_to_nsecs() function

[Xie XiuQi]

On 2014/5/20 6:35, Luck, Tony wrote:
>> Another problem, maybe we should use get_jiffies_64() instead of jiffies
>> directly here OR we'll meet wraparound problems on 32bit system. But a
>> same problem is that the jiffies_lock is not safe in NMI context...
> 
> To quote Winnie the Pooh - "Bother".
> 
> Can someone think of a clever way to get a sane 64 bit jiffie value on
> 32-bit systems (even when we get an NMI in the middle of updating the
> 64-bit jiffie)?

Hi Tony & Steven,

I've sent a patch to solve this problem, please help to review, thanks.

	http://lkml.org/lkml/2014/6/28/41
	tracing: fix uptime overflow problem

Thanks,
	XiuQi

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