From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alexey Dobriyan <adobriyan@gmail.com>
Subject: Re: [Bug #15589] 2.6.34-rc1: Badness at fs/proc/generic.c:316
Date: Tue, 20 Apr 2010 15:55:28 +0000 (UTC)
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Date: Wed, 21 Apr 2010 18:55:47 +0300
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To: Michael Ellerman <michael@ellerman.id.au>
Cc: Christian Kujau <lists@nerdbynature.de>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, "Rafael J. Wysocki" <rjw@sisk.pl>, linuxppc-dev@ozlabs.org, schwab@linux-m68k.org, Kernel Testers List <kernel-testers@vger.kernel.org>, Maciej Rutecki <maciej.rutecki@gmail.com>

On Tue, Apr 20, 2010 at 10:18:18PM +1000, Michael Ellerman wrote:
> On Mon, 2010-04-19 at 23:45 -0700, Christian Kujau wrote:
> --- a/fs/proc/proc_devtree.c
> +++ b/fs/proc/proc_devtree.c
> @@ -175,6 +175,24 @@ retry:
>         return fixed_name;
>  }
>  
> +static const char *unslash_name(const char *name)
> +{
> +       char *p, *fixed_name;
> +
> +       fixed_name = kstrdup(name);
> +       if (!fixed_name) {
> +               printk(KERN_ERR "device-tree: Out of memory trying to unslash "
> +                               "name \"%s\"\n", name);
> +               return name;
> +       }
> +
> +       p = fixed_name;
> +       while ((p = strstr(p, "/")))
> +               *p++ = '_';

This is wasteful. :-)
Also, I hope we won't spit message every time allocation fail.