/* we have /subsystem/, forget all the old stuff */

/* we have /subsystem/, forget all the old stuff */

[Alan Jenkins]

I don't have /subsystem/ (v2.6.32-rc5, no CONFIG_SYSFS_DEPRECATED).

$ ls /sys
block  bus  class  dev  devices  firmware  fs  hypervisor  kernel  
module  power

Yet there is some code in udev_enumerate_scan_devices() which tries to 
use /sys/subsystem/.  Will it be implemented in some future kernel?  If 
not, should the code be removed from udev?  If it is currently necessary 
for backwards compatability, perhaps the comment should be updated :-).

Regards
Alan

Re: /* we have /subsystem/, forget all the old stuff */

[Kay Sievers]

On Sat, Nov 7, 2009 at 17:39, Alan Jenkins <alan-jenkins@tuffmail.co.uk> wrote:
> I don't have /subsystem/ (v2.6.32-rc5, no CONFIG_SYSFS_DEPRECATED).
>
> $ ls /sys
> block  bus  class  dev  devices  firmware  fs  hypervisor  kernel  module
>  power
>
> Yet there is some code in udev_enumerate_scan_devices() which tries to use
> /sys/subsystem/.  Will it be implemented in some future kernel?  If not,
> should the code be removed from udev?  If it is currently necessary for
> backwards compatability, perhaps the comment should be updated :-).

It will come some day, and unify the access across all subsystems and
allow proper per-subsys attribute for "classes". I just need to some
more time to finish it properly.

References are here:
  http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/sysfs-rules.txt;hb=HEAD
  http://git.kernel.org/?p=linux/kernel/git/kay/patches.git;a=blob;f=subsys.patch;hb=HEAD

Cheers,
Kay