--672768-947925046-921225110=:3467
Content-Type: TEXT/PLAIN; CHARSET=US-ASCII
Content-ID: <Pine.LNX.4.05.9903120853421.3467@Bari.suse.de>
Hi,
many drivers can't refuse to load as module just in case they are already
compiled-in and running in the kernel. So the loading and unloading
causes trouble, in this case. End result can be a hard kernel oops.
For example, serial.o has this problem, so if you boot a 2.2.3 with
compiled-in serial.o, load the module (accidentally), and unload it.
Then do a setserial on the devices and you get a pretty hard oops.
The attached patch for 2.2.3 can be used as an example how this could
be prevented.
Interested developers should take a look at it and continue development.
It also creates an nice /proc/feature if a driver is registered:
Name: serial, Version:4.27, Type:tty, Info:Serial driver
A broad use of this in a better format could be useful for supporters.
Bernhard
--672768-947925046-921225110=:3467
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Content-Description: feature-0.4.diff
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