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SubjectRe: [PATCH 1/2] chrdev: implement __[un]register_chrdev()
On Thu, Aug 06, 2009 at 01:30:30AM +0900, Tejun Heo wrote:
> 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.

That's an understatement :)


> register_chrdev_region() only registers chrdev region.
> register_chrdev() registers chrdev region and creates a cdev for the
> region. :-)

Yes, but you can use register_chrdev_region() and then call cdev_alloc()
for the specific cdevs you need, right? It's not the prettiest, but it
should work.

thanks,

greg k-h


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