linux-kernel - Re: [RFC PATCH] x86: Add safe_udelay() and safe

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Message-ID: <20110113234852.GB17904@kroah.com>
Date:	Thu, 13 Jan 2011 15:48:52 -0800
From:	Greg KH <greg@...ah.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>, Tejun Heo <tj@...nel.org>
Subject: Re: [RFC PATCH] x86: Add safe_udelay() and safe_msleep()

On Thu, Jan 13, 2011 at 03:04:28PM -0800, Yinghai Lu wrote:
> > 
> > What the hell is the root problem ?
> 
> for patch
> 
> x86: usb handoff in early_quirk
> 
> some systems keep getting
>   APIC calibration not consistent with PM-Timer: 139ms instead of 100ms
>   APIC delta adjusted to PM-Timer: 831249 (1163736)
> 
> USB legacy SMI handler is not disabled at that time.

But is that causing a real problem?  You never answered that question
when I asked it in the past, which makes me think that all of this work
is for no good reason.

thanks,

greg k-h
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