On Tue, 16 Aug 2005, Andi Kleen wrote:
On Mon, Aug 15, 2005 at 03:58:09PM -0700, [email protected] wrote:
I was going to attempt to clean up the math-emu code to make it use the
nice new segment and descriptor table accessors, but it quickly became
apparent that this would be a long, tedious, error prone process that
would eventually result in the death of a large section of my brain.
In addition, it is not very fun to test this on the actual hardware it
is designed to run on (although I did manage to track down a 386 with
detachable i387 coprocessor, the owner is not sure it still boots).
Someday it would be nice to have an audit of this code; it appears to
be riddled with bugs relating to segmentation, for example it assumes
LDT segments on overrides, does not use the mm->context semaphore to
protect LDT access, and generally looks scarily out of date in both
function and appearance.
Perhaps the best would be to just remove it. Near all 386s should be far
beyond their MTBF by now. Mark it CONFIG_BROKEN and if nobody complains for
one or two releases remove it completely.
you are forgetting about the embedded market, there 386 cpu (or things
that look like 386 cpu's) are still available.
David Lang
The ugly verify_area 386 bugfix workaround code could go at the same
time.
-Andi
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