Linux-kernel mailing list archive 2000-04,: Re: [RFC] change in /proc/devices

# Re: [RFC] change in /proc/devices

Andre Hedrick (andre@suse.com)
Thu, 27 Jan 2000 02:21:53 -0800 (PST)

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On Thu, 27 Jan 2000, Alexander Viro wrote:

>
>
> On 22 Jan 2000, david parsons wrote:
>
> > In article <linux.kernel.Pine.GSO.4.10.10001222307410.27195-100000@weyl.math.psu.edu>,
> > Alexander Viro <viro@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.
> >
> > Changing sort order shouldn't matter, but pulling information out does.
>
> Humpf... You know, there may be a better way to do it. What would you say
> about:
>
> $ cat /proc/drivers/block/devices
> 0300[40] hda
> 0340[40] hdb
> 2100[40] hde
2100[40] hdc not e
> 2140[40] hdf
2140[40] hdd not f

0300 hda, 0340 hdb
2100 hdc, 2140 hdd

./linux/init/main.c

#ifdef CONFIG_BLK_DEV_IDE
{ "hda", 0x0300 },
{ "hdb", 0x0340 },
{ "hdc", 0x1600 },
{ "hdd", 0x1640 },
{ "hde", 0x2100 },
{ "hdf", 0x2140 },
{ "hdg", 0x2200 },
{ "hdh", 0x2240 },
{ "hdi", 0x3800 },
{ "hdj", 0x3840 },
{ "hdk", 0x3900 },
{ "hdl", 0x3940 },
{ "hdm", 0x5800 },
{ "hdn", 0x5840 },
{ "hdo", 0x5900 },
{ "hdp", 0x5940 },
{ "hdq", 0x5A00 },
{ "hdr", 0x5A40 },
{ "hds", 0x5B00 },
{ "hdt", 0x5B40 },
#endif

> 0800[10] sda
> etc.
> If anything, it simplifies MAKEDEV-style scripts big way. And has a benefit
> of making them work with any allocation scheme for device numbers. Format
> is obvious: "%04x[%x] %s", first_device_number, amount, name. If you
> really want it we might add driver name in the end of the thing, but that
> might be an overkill. Comments?
>
>
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Andre Hedrick
The Linux ATA/IDE guy

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