From: Chris Wright <chrisw at sous-sol.org> Date: Tue, 18 Jul 2006 00:00:32 -0700 > +#ifdef CONFIG_XEN_BALLOON > +#include <xen/balloon.h> > +#endif Let's put the ifdefs in xen/balloon.h not in the files including it. > +#ifdef CONFIG_XEN_BALLOON > + /* Tell the ballon driver what is going on. */ > + balloon_update_driver_allowance(i); > +#endif Similarly let's define empty do-nothing functions in xen/balloon.h when the config option isn't set so we don't need to crap up the C sources with these ifdefs.