linux-kernel - Re: [PATCH V7 1/8] ntp: add ADJ

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Message-ID: <20101222071319.GB8627@riccoc20.at.omicron.at>
Date:	Wed, 22 Dec 2010 08:13:19 +0100
From:	Richard Cochran <richardcochran@...il.com>
To:	john stultz <johnstul@...ibm.com>
Cc:	"Kuwahara,T." <6vvetjsrt26xsrzlh1z0zn4d2grdah@...il.com>,
	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	netdev@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Christoph Lameter <cl@...ux.com>,
	David Miller <davem@...emloft.net>,
	Krzysztof Halasa <khc@...waw.pl>,
	Peter Zijlstra <peterz@...radead.org>,
	Rodolfo Giometti <giometti@...ux.it>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH V7 1/8] ntp: add ADJ_SETOFFSET mode bit

On Tue, Dec 21, 2010 at 02:25:55PM -0800, john stultz wrote:
> On Wed, 2010-12-22 at 05:57 +0900, Kuwahara,T. wrote:
> 
> > How about this?
> > 
> > if (txc->modes & ADJ_OFFSET) {
> > 	if (txc->constant == INT32_MIN) {
> > 		/* step time */
> > 	} else {
> > 		/* slew time */
> > 	}
> > }
> 
> This looks like magic behavior. Sort of a "knock twice and then say the
> password" interface. I don't see why that would be better then adding a
> clear new mode flag?

I have to agree with John on this one. Looks very hacky to me.

Richard
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