Russell King recently sent out a heads-up
regarding a PCMCIA subsystem change which will affect some users. In
2.6.13, if a PCMCIA driver is linked directly into the kernel, its devices
will be recognized and bound at boot time. That means that no hotplug
events will be generated for those devices. Since many systems use the
hotplug subsystem to do things like configuring network interfaces, this
change could lead to broken systems.
There are also concerns about the naming of disk devices; the presence or
absence of a PCMCIA device could cause the names of other disks on the
system to change from one boot to the next. Dominik Brodowski has posted
a patch which causes PCMCIA IDE devices to
be initialized late in the boot process in an attempt to minimize this
problem; he also notes that udev is the right way to deal with
device naming issues.
Meanwhile, most users will not be affected because most distributors build
their PCMCIA drivers as modules. Devices managed by those drivers will be
configured after the system is bootstrapped, and will generate hotplug
events as usual.
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