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. 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
