Re: [patch] paravirt: isolate module ops

[Zachary Amsden <zach@vmware.com>]

Ingo Molnar wrote:
> * Rusty Russell <rusty@rustcorp.com.au> wrote:
>
>   
>> +EXPORT_SYMBOL(clts);
>> +EXPORT_SYMBOL(read_cr0);
>> +EXPORT_SYMBOL(write_cr0);
>>     
>
> mark these a _GPL export. Perhaps even mark the symbol deprecated, to be 
> unexported once we fix raid6.
>   

read / write cr0 must not be GPL, since kernel_fpu_end uses them and is 
inline.  clts I don't think matters.


>> +EXPORT_SYMBOL(wbinvd);
>> +EXPORT_SYMBOL(raw_safe_halt);
>> +EXPORT_SYMBOL(halt);
>> +EXPORT_SYMBOL_GPL(apic_write);
>> +EXPORT_SYMBOL_GPL(apic_read);
>>     
>
> these should be _GPL too. If any module uses it and breaks a user's box 
> we need that big licensing hint to be able to debug them ...
>   

Perhaps also, MSRs are too dangerous for binary modules to be messing with.

Agree on halt - but wbinvd can theoretically be used for device mapped 
memory consistency.

Zach