linux-kernel - Re: [PATCH 1/2 v3] Staging: comedi: fix printk() issue in adv

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Date:	Tue, 19 Jul 2011 09:25:59 +0300
From:	Dan Carpenter <error27@...il.com>
To:	Ryan Mallon <rmallon@...il.com>
Cc:	Ravishankar <ravishankarkm32@...il.com>,
	devel@...verdev.osuosl.org, gregkh@...e.de,
	linux-kernel@...r.kernel.org,
	Ravishankar <ravi.shankar@...enturtles.in>
Subject: Re: [PATCH 1/2 v3] Staging: comedi: fix printk() issue in
 adv_pci1710.c

On Tue, Jul 19, 2011 at 04:15:51PM +1000, Ryan Mallon wrote:
> On 19/07/11 16:12, Dan Carpenter wrote:
> >On Tue, Jul 19, 2011 at 04:07:27PM +1000, Ryan Mallon wrote:
> >>This still isn't correct. The initial printk (KERN_INFO above) has
> >>no trailing newline. Here you are almost doing it correctly, except
> >>that you are adding an extra newline. This error message will look
> >>like this:
> >>
> >>comedi0: adv_pci1710:
> >>comedi0: adv_pci1710: Allocation failed
> >>
> >Actually kmalloc() prints an message with a stack trace on failure as
> >well so that would go in the middle, just before the first newline.
> >
> 
> Thanks. Didn't know that. Is that a KConfig option or by default?

By default, unless you call kmalloc() with __GFP_NOWARN.  The warning
is in warn_alloc_failed().

regards,
dan carpenter

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