linux-kernel - Re: [PATCH 1/3] DEBUGFS: Automatically create parents for debugfs files v2

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Date:	Wed, 14 Dec 2011 02:22:56 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	greg@...ah.com, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 1/3] DEBUGFS: Automatically create parents for debugfs
 files v2

On Tue, Dec 13, 2011 at 01:45:32PM -0800, Andi Kleen wrote:
>  
> +/*
> + * Created parents stay around later. Sorry, but it shouldn't be a big issue.
> + */
> +static const char *create_parents(const char *name, struct dentry *parent,
> +				  struct dentry **pp, int *ref)
> +{
> +	char fn[strlen(name) + 1];
> +	char *tail;
> +	char *s, *p;
> +	struct dentry *new_parent, *dentry, *old_parent = NULL;
> +
> +	strcpy(fn, name);
> +	tail = strrchr(fn, '/');
> +	if (!tail)
> +		return name;
> +	tail++;
> +

Hi Andi, is it possible to do say kstrdup or something instead of
variable-size array in fn[strlen(name) + 1] ? As far as I remember
we already had some warnings with them at least in perf land (or
trace land). Or I miss something?

	Cyrill
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