On Thu, May 19, 2016 at 09:38:30AM +0800, Binbin Zhou wrote: > diff --git a/arch/mips/include/asm/sparsemem.h b/arch/mips/include/asm/sparsemem.h > index b1071c1..f73e671 100644 > --- a/arch/mips/include/asm/sparsemem.h > +++ b/arch/mips/include/asm/sparsemem.h > @@ -11,7 +11,11 @@ > #else > # define SECTION_SIZE_BITS 28 > #endif > -#define MAX_PHYSMEM_BITS 48 > +#ifdef CONFIG_64BIT > +# define MAX_PHYSMEM_BITS 48 > +#else > +# define MAX_PHYSMEM_BITS 36 > +#endif This doesn't look right for XPA. What do you think, James? I think we don't use sparsemem on XPA atm so I can apply this safely - but it should be fixed properly. Ralf