linux-kernel - Re: [PATCH] mac80211_hwsim: use dyndbg for debug messages

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Date:   Wed, 28 Jun 2017 06:37:42 -0700
From:   Joe Perches <joe@...ches.com>
To:     Lubomir Rintel <lkundrak@...sk>,
        Johannes Berg <johannes@...solutions.net>
Cc:     Kalle Valo <kvalo@...eaurora.org>, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mac80211_hwsim: use dyndbg for debug messages

On Wed, 2017-06-28 at 15:17 +0200, Lubomir Rintel wrote:
> The mac80211_hwsim doesn't offer a way to disable the debugging output.
> Unfortunately, it's pretty chatty, dumping a  lot of stuff into the message
> buffer.
> 
> This patch changes it to use dyndbg for controlling the debug output.
> It's disabled by default, but can be enabled by a module parameter (1),
> at runtime (2) or persisted in modprobe.conf (3).
> 
>   (1) modprobe mac80211_hwsim dyndbg=+p
>   (2) echo "module mac80211_hwsim +p" >/sys/kernel/debug/dynamic_debug/control
>   (3) echo "options mac80211_hwsim dyndbg=+p" >>/etc/modprobe.d/my.conf

I wonder about the value at all of the 2 forms:

wiphy_dbg	-> only with #define DEBUG or dynamic_debug
wiphy_debug	-> always emitted at KERN_DEBUG

Is there any real value in wiphy_debug?

Should it just be converted to

#define wiphy_debug	wiphy_dbg

or maybe a global sed to remove it completely?