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From: Pierre Ossman <>
To: Kay Sievers <>
Cc: Greg KH <>, LKML <>
Subject: Re: No more "device" symlinks for classes
Date: Sun, 14 Jan 2007 01:29:51 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Kay Sievers wrote:
> The plan is to have a single unified tree at /sys/devices, where all
> device-directories live below their parents, and /sys/class contains
> only symlinks pointing into this single tree, just like /sys/bus.
> People want to stack class-devices, but this leads to a /sys/devices
> tree and several small trees spread around in /sys/class. These trees
> need to be connected by "device"-links and the "class:"-links, which
> just doesn't make much sense if you can have one single tree with the
> same information.
> In the unified tree, the "device"-link will always just point to the
> parent device, that's why there is a config option to disable these
> links and test current software not to depend on it.

I'm not sure I completely follow. Should an application look at the
symlink (e.g. /sys/class/fooclass/foodev -> /sys/devices/...) and follow
that one level up? If so, then this sounds a bit complicated. Especially
from shell scripts.


     -- Pierre Ossman

  Linux kernel, MMC maintainer
  PulseAudio, core developer
  rdesktop, core developer

  reply	other threads:[~2007-01-14  0:29 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-13 23:51 Pierre Ossman
2007-01-14  0:02 ` Kay Sievers
2007-01-14  0:29   ` Pierre Ossman [this message]
2007-01-14  0:35     ` Kay Sievers
2007-01-14  6:10 ` Andrey Borzenkov
2007-01-14  7:39   ` Greg KH
2007-01-14  8:46     ` Kay Sievers

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