quick question on 64-bit values with 32-bit inline assembly

["Chris Friesen" <cfriesen@xxxxxxxxxx>]

Hi all,

We're running a 64-bit kernel and 32-bit userspace.  We've got some code 
that is trying to get a 64-bit timestamp in userspace.

The following code seems to work fine in the kernel but in userspace it 
appears to be swapping the two words in the result.

gethrtime(void)
{
   unsigned long long result;

   asm volatile ("rdhwr %0,$31" : "=r" (result));
   return result;
}

Do I need to do something special because userspace is 32-bit?  If so, 
can someone point me to a reference?

Thanks,

Chris Friesen