David Woodhouse (dwmw2@infradead.org) said:
!CONFIG_SYSFS_DEPRECATED changes the sysfs layout significantly. (Hey, when they say the kernel doesn't have a fixed ABI, they aren't kidding.)
This breaks the hardware detection logic used by the installer in about five or six different places.
But changes to environment variables in the hotplug script invocations shouldn't hurt, right?
No, but that's not the reason we have DEPRECATED on.
Bill