[PATCH] detect Xen dom0 properly to avoid conflict with pv_on_hvm domU

[Simon Horman]

On Thu, May 05, 2011 at 02:34:46PM +0200, Olaf Hering wrote:
> On Thu, May 05, Simon Horman wrote:
> 
> > On Wed, May 04, 2011 at 06:32:32PM +0200, Olaf Hering wrote:
> 
> > > +static int is_dom0;
> > 
> > I think you need to explicitly initialise is_dom0 to 0.
> 
> Globals are always initialized to zero, its a C language thing.

Point taken :^)

> > Alternatively, is it really such a burden to call access()
> > each time xen_present() is called?  (I'm ambivalent with regards to this).
> 
> Probably not, its called a dozen times in my testing.

As we already have the code it seems that we may as well use it.

I've merged your patch as-is.