linux-kernel - Re: [RFC Patch 1/1] debugfs_printk and debugfs

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Message-ID: <480DFBED.8020304@oracle.com>
Date:	Tue, 22 Apr 2008 07:53:33 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	prasad@...ux.vnet.ibm.com
CC:	David Wilder <dwilder@...ibm.com>, linux-kernel@...r.kernel.org,
	mathieu.desnoyers@...ymtl.ca, hunt@...hat.com,
	michaele@....ibm.com, dave@...ux.vnet.ibm.com
Subject: Re: [RFC Patch 1/1] debugfs_printk and debugfs_dump interface

K. Prasad wrote:

> This patch introduces two new interfaces called debugfs_printk and 
> debugfs_dump which can be used to print to the debugfs mount directly.
> It uses the 'trace' infrastructure underneath and is a patch over it.
> A sample file is also created to demonstrate its ease of use.
> 
> Signed-off-by: K.Prasad <prasad@...ux.vnet.ibm.com>
> ---
>  Documentation/trace.txt        |   21 ++++
>  include/linux/trace.h          |   55 +++++++++++
>  lib/trace.c                    |  193 +++++++++++++++++++++++++++++++++++++++--
>  samples/trace/Makefile         |    2 
>  samples/trace/fork_new_trace.c |   97 ++++++++++++++++++++
>  5 files changed, 362 insertions(+), 6 deletions(-)

> +
> +/**
> + * debugfs_printk - Output binary into debugfs mount 'directly' using 'trace'

Oops. This is the debugfs_dump() function.

Otherwise it looks good.  Thanks.

> + * @dpk: Structure containing info such as parent_dir and directory
> + * @output: Data that needs to be output
> + * @output_len: Length of the output data
> + */
> +int debugfs_dump(struct debugfs_printk_data *dpk, const void *output,
> +							const int output_len)
> +{


-- 
~Randy
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