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Subject: Re: dynamic debug
From: Johannes Berg <johannes@sipsolutions.net>
To: Joe Perches <joe@perches.com>
Cc: David Miller <davem@davemloft.net>,
	Jim Cromie <jim.cromie@gmail.com>,
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Date: Fri, 22 Jun 2012 19:30:09 +0200
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On Fri, 2012-06-22 at 08:32 -0700, Joe Perches wrote:

> > Are you sure? It doesn't really seem to work ...
> > 
> > #if defined(CONFIG_DYNAMIC_DEBUG)
> > /* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
> > #define pr_debug(fmt, ...) \
> >         dynamic_pr_debug(fmt, ##__VA_ARGS__)
> > #elif defined(DEBUG)
> > #define pr_debug(fmt, ...) \
> >         printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
> > 
> > 
> > 
> > So basically, if you have CONFIG_DYNAMIC_DEBUG, you *still* need to
> > enable it with the dynamic debug framework, right?
> 
> No.
> 
> In dynamic_debug.h, there's a mechanism to enable all
> dynamic_pr_debug lines when DEBUG is #defined
> 
> #if defined DEBUG
> #define _DPRINTK_FLAGS_DEFAULT _DPRINTK_FLAGS_PRINT
> #else
> #define _DPRINTK_FLAGS_DEFAULT 0
> #endif

Gee, ok, so this was only added in 3.3 ...

johannes