Andi Kleen wrote:
>> Yes, it is a bit, umm, innovative.  If it is going to be kept, even if 
>> just for devel logging, you should disable interrupts around it.  
>> Changing segments is not a normal thing to do.
>>     
>
> Actually that wouldn't be needed because interrupts are not allowed to do any 
> user accesses. And contrary to the name it doesn't actually change
> the segment registers, only state used by *_user.
>   

My bad, I fell for the same mistake as everyone.  Set_fs is just way too 
confusing of a name now.  But good to know interrupts must be disable in 
such a circumstance.

Zach
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