> The code base I'm dealing with is a 2.6.13 derivative
> with PREEMPT_RT support. Looks like the problem was
> due to PREEMPT_RT confusing fpu_emulator_cop1Handler()
> resulting in a SIGBUS nailing the associated task.
> I have it sort of working for soft FPU but expect it
> requires some attention to safely access a HW FPU where
> emulation assistance is needed.
Um, did no one have a look at Atsushi Nemoto's patch earlier today
that addressed pre-emption and CPU1, or am I missing something?