[RFC] change in /proc/devices

[Alexander Viro]

On 22 Jan 2000, david parsons wrote:

> In article <linux.kernel.Pine.GSO.4.10.10001222307410.27195-100000 en weyl.math.psu.edu>,
> Alexander Viro  <viro en math.psu.edu> wrote:
> 
> >(I _really_ don't see the point in separate names for IDE interfaces here,
> 
>     Because, unlike scsi, ide majors are randomly scattered all over g-d's
>     creation.   If you've got some (puke) userland script faking devfs
>     (like recent MAKEDEV's) it will probably care about the difference
>     between ide0, ide1, ide2, and so on.

Dave, meet /dev/sdq. /dev/sdq, meet Dave. Dave, pay attention to /dev/sdq
major...

>     Changing sort order shouldn't matter, but pulling information out does.
> 
> 
> >This change is needed if we want to avoid (a) races and (b) major suckage
> >with exporting spinlocks, etc.
> 
>     Why?

One word: rmmod.

> >If somebody wants to protest - please, do
> >it _now_.
> 
>     Consider this a most vigorous protest.
> 
>                   ____
>     david parsons \bi/ Until devfs makes it into the baseline kernel, at which
>                    \/    point I will cease to give a damn about /proc/devices.

Umm... Will /proc/drivers/block/<driver>/ranges make you happy? I.e.
$ cat /proc/drivers/block/ide/ranges
0300(80)
1600(80)
2100(80)
2200(80)
$ cat /proc/drivers/block/ide/hdb/range
0340(40)
(and yes, it's _range_ - keeping device numbers for partitions in
non-contiguous area is the way to madness).


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