On Fri, Apr 05, 2013 at 12:17:54PM +0530, Vijay Chauhan wrote:
> Hi,
> 
> I am new to Linux Device Driver and reading LDD3.
> 
> It mentions that the disadvantage of dynamic major number allocation
> is that you can’t create the device nodes in
> advance, because the major number assigned to your module will vary.

That's extremely out of date, all distros now use udev (or mdev) and as
such, dynamic major/minor are fine to use, and recommended.

> To solve this problem, it says that create a script to invoke insmod
> and after calling insmod, reads /proc/devices in order to create the
> special file(s).

Not needed anymore, udev handles this for you.

Hope this helps,

greg k-h
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