linux-kernel - Re: [PATCH 1/2] chrdev: implement __[un]register

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Message-ID: <4A79B3A6.7090109@kernel.org>
Date:	Thu, 06 Aug 2009 01:30:30 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Greg KH <greg@...ah.com>
CC:	Al Viro <viro@....linux.org.uk>, Takashi Iwai <tiwai@...e.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	cguthrie@...driva.org
Subject: Re: [PATCH 1/2] chrdev: implement __[un]register_chrdev()

Greg KH wrote:
> On Wed, Aug 05, 2009 at 03:35:42PM +0900, Tejun Heo wrote:
>> [un]register_chrdev() assume minor range 0-255.  This patch adds __
>> prefixed versions which take @minorbase and @count explicitly.
> 
> What's the difference between this and the existing
> register_chrdev_region() function?  Why doesn't that work for you?
> 
> What am I missing here?

The function names in char_dev.c are quite confusing.
register_chrdev_region() only registers chrdev region.
register_chrdev() registers chrdev region and creates a cdev for the
region.  :-)

-- 
tejun
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