FPU emul and segmentation fault bug

[Jun Sun <jsun@mvista.com>]

I remember a while back we had a problem with FPU emulation code which causes
a segmentation fault.  (Perhaps another symptom is bus error, but I am not
100% sure).

Apparently this problem is fixed in the recent kernel.  However, it shows up
again in SMP mode.

Does anybody remember details of the problem and the fix?  I am afraid maybe
something we did there is not SMP safe.

Thanks.

Jun