linux-kernel - Re: [PATCH 6/7] dynamic debug v2

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Date:	Wed, 16 Jul 2008 01:07:31 +0200
From:	Dominik Brodowski <linux@...inikbrodowski.net>
To:	Jason Baron <jbaron@...hat.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	joe@...ches.com, greg@...ah.com, nick@...k-andrew.net,
	randy.dunlap@...cle.com
Subject: Re: [PATCH 6/7] dynamic debug v2 - convert cpufreq

Hi,

On Tue, Jul 15, 2008 at 05:36:13PM -0400, Jason Baron wrote:
> +#include <linux/dynamic_debug_cpufreq.h>

what's contained in this file (couldn't find it in this or one of the other
diffs, but may have missed it).

> -#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "cpufreq-nforce2", msg)
> +#define dprintk(msg...) do { \
> +	if (dynamic_dbg_enabled(TYPE_FLAG, CPUFREQ_DEBUG_DRIVER, cpufreq_debug)) \
> +		cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "cpufreq-nforce2", msg); \
> +	} while (0)

Hm.... What about leaving this as it is, renaming the
drivers/cpufreq/cpufreq.c function to __cpufreq_debug_printk(), and then
adding to include/linux/cpufreq.h

#define cpufreq_debug_printk(type, prefix, msg...) do { \
	if (dynamic_dbg_enabled(TYPE_FLAG, type, cpufreq_debug))
		cpufreq_debug_printk(type, prefix, msg); \
	} while (0)

> +#if defined(CONFIG_CPU_FREQ_DEBUG) || defined (CONFIG_DYNAMIC_PRINTK_DEBUG)
...
> +#if defined(CONFIG_CPU_FREQ_DEBUG) || defined (CONFIG_DYNAMIC_PRINTK_DEBUG)

can't we just depend on thing on another?

> -module_param(debug, uint, 0644);
> -MODULE_PARM_DESC(debug, "CPUfreq debugging: add 1 to debug core,"
> +module_param(cpufreq_debug, uint, 0644);
> +MODULE_PARM_DESC(cpufreq_debug, "CPUfreq debugging: add 1 to debug core,"
>  			" 2 to debug drivers, and 4 to debug governors.");

cpufreq.cpufreq_debug is ugly and not backwards compatible... what about 

module_param_named(debug, cpufreq_debug, uint, 0644) [or the other way
around, I always forget...])

Best,
	Dominik
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