linux-kernel - Re: [patch -mm 10/28] highres: Improve debug output

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Message-Id: <20070625171404.4717ed48.akpm@linux-foundation.org>
Date:	Mon, 25 Jun 2007 17:14:04 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andi Kleen <ak@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Arjan van de Ven <arjan@...radead.org>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	John Stultz <johnstul@...ibm.com>,
	Chris Wright <chrisw@...s-sol.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch -mm 10/28] highres: Improve debug output

On Sat, 23 Jun 2007 13:32:35 -0000
Thomas Gleixner <tglx@...utronix.de> wrote:

>  	if (!dev || !(dev->features & CLOCK_EVT_FEAT_ONESHOT) ||
> -	    !tick_device_is_functional(dev))
> +		    !tick_device_is_functional(dev)) {
> +
> +		printk(KERN_INFO "Clockevents: "
> +		       "could not switch to one-shot mode:");
> +		if (!dev) {
> +			printk(" no tick device\n");
> +		} else {
> +			if (!tick_device_is_functional(dev))
> +				printk(" %s is not functional.\n", dev->name);
> +			else if (!(dev->features & CLOCK_EVT_FEAT_ONESHOT))
> +				printk(" %s does not support one-shot mode.\n",
> +				       dev->name);
> +		}

There is a logic path through here where the printk doesn't get its \n
termination?  And it will fail to print the reason for the failure, too.

Maybe that's a can't-happen, in which case the CLOCK_EVT_FEAT_ONESHOT test
is superfluous?

-
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