microcode, devfs: Wrong interface change in 2.4.25

["Giacomo A. Catenazzi" <cate@debian.org>]

Hello!

 From the 2.4.25, devfs doesn't create anymore the microcode
device in /dev/cpu/microcode (as expected from in devices.txt
and LANANA) but in /dev/misc/microcode. The /dev/cpu/microcode
path is also hardcoded also in microcode_ctl and distributions
create only /dev/cpu/microcode.

So last microcode patch (in 2.4.25) is wrong.
You should add again the /dev/cpu/microcode support in devfs, so
that the normal and stable interface is maintained (in stable
kernel serie)

ciao
	giacomo



Ryan Underwood wrote:

> On Mon, Feb 23, 2004 at 09:47:58AM +0100, Giacomo A. Catenazzi wrote:
> 
>>>What I meant is that the name "/dev/misc/microcode" must be used instead
>>>of "/dev/cpu/microcode", because the microcode driver in 2.4.25 no
>>>longer registers with devfs.
>>
>>I don't undestand.
>>Do you say that devfs will register only /dev/misc/microcode ?
> 
> 
> No, the microcode driver only registers with misc.
> 
> 
>>So if devfs will register misc/microcode, it is probably
>>a kernel bug (interface should not change!) or a problem
>>with LANANA (in this case I should change misc microcode
>> in drivers, but after an update to 'makedev' package.
> 
> 
> Examine microcode.c driver diff between 2.4.23 and 2.4.25 in the init
> function.  The removed code is obvious.
>