Re: [PATCH] Make math_state_restore() save and restore the interrupt flag

[Linus Torvalds]

On Sat, Feb 1, 2014 at 5:47 PM, Suresh Siddha <sbsiddha@xxxxxxxxx> wrote:
>
> So if the restore failed, we should do something like drop_init_fpu(),
> which will restore init-state to the registers.
>
> for eager-fpu()  paths we don't use clts() stts() etc.

Uhhuh. Ok.

Why do we do that, btw? I think it would make much more sense to just
do what I *thought* we did, and just make it a context-switch-time
optimization ("let's always switch FP state"), not make it a huge
semantic difference.

                Linus
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