On Tue, Dec 04, 2007 at 09:18:33PM +0200, Avi Kivity wrote:
> Glauber de Oliveira Costa wrote:
>> This patch moves the i386 control registers manipulation functions,
>> wbinvd, and clts functions to system.h. They are essentially the same
>> as in x86_64, except for the cr8 register, which we add.
>>
>> +
>> +static inline unsigned long native_read_cr8(void)
>> +{
>> + unsigned long cr8;
>> + asm volatile("mov %%cr8,%0" : "=r" (cr8), "=m" (__force_order));
>> + return cr8;
>> +}
>> +
>>
>
> There is no cr8 register on i386. This had better be protected by an
> #ifdef.
>
> (you're likely not getting an error since it's a static inline, so the asm
> is never emitted)
Linux never uses that register. The only user is suspend save/restore,
but that' bogus because it wasn't ever initialized by Linux in the first
place. It could be probably all safely removed.
-Andi
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