On Fri, Feb 15, 2019 at 05:02:24PM +0000, Steven Price wrote: > From: James Morse <[email protected]> > > Exposing the pud/pgd levels of the page tables to walk_page_range() means > we may come across the exotic large mappings that come with large areas > of contiguous memory (such as the kernel's linear map). > > For architectures that don't provide p?d_large() macros, provided a > does nothing default.
Kan was going to fix that for all archs I think.. See: http://lkml.kernel.org/r/[email protected] > Signed-off-by: James Morse <[email protected]> > Signed-off-by: Steven Price <[email protected]> > --- > include/asm-generic/pgtable.h | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h > index 05e61e6c843f..7630d663cd51 100644 > --- a/include/asm-generic/pgtable.h > +++ b/include/asm-generic/pgtable.h > @@ -1186,4 +1186,14 @@ static inline bool arch_has_pfn_modify_check(void) > #define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) > #endif > > +#ifndef pgd_large > +#define pgd_large(x) 0 > +#endif > +#ifndef pud_large > +#define pud_large(x) 0 > +#endif > +#ifndef pmd_large > +#define pmd_large(x) 0 > +#endif > + > #endif /* _ASM_GENERIC_PGTABLE_H */ > -- > 2.20.1 >
