linux-kernel - Re: [PATCH 08/21] dynamic_debug: factor show_ddebug_query out of ddebug_parse

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Date:	Mon, 25 Jul 2011 13:10:58 +0200
From:	Bart Van Assche <bvanassche@....org>
To:	Jim Cromie <jim.cromie@...il.com>
Cc:	jbaron@...hat.com, linux-kernel@...r.kernel.org, joe@...ches.com,
	gregkh@...e.de, gnb@...h.org
Subject: Re: [PATCH 08/21] dynamic_debug: factor show_ddebug_query out of ddebug_parse_query

On Sat, Jul 16, 2011 at 11:32 PM, Jim Cromie <jim.cromie@...il.com> wrote:
> using kasprintf would entail;
> - a local char* var,
> - a call to the string-producer (show_ddebug_query above)
> - a kfree(var)
> all in the caller context.
> Using a preallocated string buffer avoids this,
> and is slightly more efficient wrt kallocs.

I'm still missing an explanation why the static variable "prbuf_query"
is necessary. Wouldn't eliminating that static variable make the code
more elegant ?

Bart.
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