linux-kernel - Re: [PATCH] remove pointless debug printk in rt_ioctl

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Date:	Sat, 5 Jun 2010 12:07:39 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Giangiacomo Mariotti <giangiacomo.mariotti@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, gregkh@...e.de,
	bzolnier@...il.com, roel.kluin@...il.com,
	devel@...verdev.osuosl.org
Subject: Re: [PATCH] remove pointless debug printk in rt_ioctl_giwscan()

On Saturday 05 June 2010, Giangiacomo Mariotti wrote:
> This debug printk is only useful if you're debugging the staging drivers
> 2860 e 2870, but, if you're just using them, it becomes really annoying, because
> it uselessly clobbers the kernel log. I guess this patch shouldn't really get merged,
> but it's more like a request to remove these annoying debugging messages for normal users.
> If I get any suggestion on how to implement this in a way acceptable to get it merged, I'll
> be happy to create the "good" version  of the patch.

Ideally, drivers should not have their own debugging macros like this, but
instead use the kernel's own pr_debug() and (preferrably) dev_dbg() macros,
which are disabled by default.
For many of these debugging outputs, it's even better to kill them entirely
instead of converting to dev_dbg().
Do not put the line in comments though.

	Arnd
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