1 files changed, 38 insertions, 0 deletions

diff --git a/include/asm-generic/4level-fixup.h b/include/asm-generic/4level-fixup.h
new file mode 100644
index 000000000000..c20ec257ecc0
--- /dev/null
+++ b/include/asm-generic/4level-fixup.h
@@ -0,0 +1,38 @@
+#ifndef _4LEVEL_FIXUP_H
+#define _4LEVEL_FIXUP_H
+
+#define __ARCH_HAS_4LEVEL_HACK
+#define __PAGETABLE_PUD_FOLDED
+
+#define PUD_SIZE                        PGDIR_SIZE
+#define PUD_MASK                        PGDIR_MASK
+#define PTRS_PER_PUD                    1
+
+#define pud_t                           pgd_t
+
+#define pmd_alloc(mm, pud, address)                     \
+({      pmd_t *ret;                                     \
+        if (pgd_none(*pud))                             \
+                ret = __pmd_alloc(mm, pud, address);    \
+        else                                            \
+                ret = pmd_offset(pud, address);         \
+        ret;                                            \
+})
+
+#define pud_alloc(mm, pgd, address)     (pgd)
+#define pud_offset(pgd, start)          (pgd)
+#define pud_none(pud)                   0
+#define pud_bad(pud)                    0
+#define pud_present(pud)                1
+#define pud_ERROR(pud)                  do { } while (0)
+#define pud_clear(pud)                  pgd_clear(pud)
+
+#undef pud_free_tlb
+#define pud_free_tlb(tlb, x)            do { } while (0)
+#define pud_free(x)                     do { } while (0)
+#define __pud_free_tlb(tlb, x)          do { } while (0)
+
+#undef  pud_addr_end
+#define pud_addr_end(addr, end)         (end)
+
+#endif