linux-kernel - Re: [PATCH V5 0/13] perf: Intel uncore pmu counting support

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Date:	Wed, 27 Jun 2012 11:10:13 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	"Yan, Zheng" <zheng.z.yan@...el.com>, mingo@...e.hu,
	jolsa@...hat.com, andi@...stfloor.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V5 0/13] perf: Intel uncore pmu counting support

On Wed, 2012-06-27 at 03:05 +0200, Stephane Eranian wrote:
> If you compile the uncore support in 32-bit mode, you will
> get a warning on the hrtimer_start_range_ns() functions
> because the interval is passed as ktime_t whereas the
> function expects unsigned long.  With 64-bit, no problem
> ktime_t is a union with s64. But in 32-bit mode, there is
> a possible truncation of the delta. This needs to be
> fixed. 

Right, Andrew has a patch for that, I guess I'd better make sure it
appears in tip as well.


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