On Fri, May 29, 2020 at 10:28:33AM -0700, Andy Lutomirski wrote:
> > +static __always_inline unsigned long local_db_save(void)
> > +{
> > +    unsigned long dr7;
> > +
> > +    get_debugreg(&dr7, 7);
> > +    dr7 ^= 0x400;
> 
> Why xor?  This seems extra confusing.

I'll do the normal mask thing ..

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