Hi Dave, On Mon, 20 Mar 2023 11:58:14 -0700, Dave Hansen <dave.hansen@xxxxxxxxx> wrote: > On 3/20/23 11:59, Jacob Pan wrote: > > --- a/arch/x86/kernel/traps.c > > +++ b/arch/x86/kernel/traps.c > > @@ -40,7 +40,10 @@ > > #include <linux/io.h> > > #include <linux/hardirq.h> > > #include <linux/atomic.h> > > -#include <linux/ioasid.h> > > + > > +#ifdef CONFIG_IOMMU_SVA > > +#include <linux/iommu.h> > > +#endif > > What's the deal with the #ifdef'd #include? > > What's the harm of just making it unconditional? No harm for this version. I will remove. Thanks, Jacob