@@ -1186,4 +1186,23 @@ static inline bool arch_has_pfn_modify_check(void)
#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED)
#endif
+/*
+ * p?d_large() - true if this entry is a final mapping to a physical address.
+ * This differs from p?d_huge() by the fact that they are always available (if
+ * the architecture supports large pages at the appropriate level) even
+ * if CONFIG_HUGETLB_PAGE is not defined.
+ */
+#ifndef pgd_large
+#define pgd_large(x) 0
+#endif
+#ifndef p4d_large
+#define p4d_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 */
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, provide generic does nothing defaults. Signed-off-by: Steven Price <steven.price@arm.com> --- include/asm-generic/pgtable.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)