walk_page_range() is going to be allowed to walk page tables other than
those of user space. For this it needs to know when it has reached a
'leaf' entry in the page tables. This information will be provided by the
p?d_large() functions/macros.
For arm, we already provide most p?d_large() macros. Add a stub for PUD
as we don't have huge pages at that level.
CC: Russell King <linux@xxxxxxxxxxxxxxx>
Signed-off-by: Steven Price <steven.price@xxxxxxx>
---
arch/arm/include/asm/pgtable-2level.h | 1 +
arch/arm/include/asm/pgtable-3level.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm/include/asm/pgtable-2level.h b/arch/arm/include/asm/pgtable-2level.h
index 12659ce5c1f3..adcef1306892 100644
--- a/arch/arm/include/asm/pgtable-2level.h
+++ b/arch/arm/include/asm/pgtable-2level.h
@@ -183,6 +183,7 @@
#define pud_none(pud) (0)
#define pud_bad(pud) (0)
#define pud_present(pud) (1)
+#define pud_large(pud) (0)
#define pud_clear(pudp) do { } while (0)
#define set_pud(pud,pudp) do { } while (0)
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 6d50a11d7793..9f63a4b89f45 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -141,6 +141,7 @@
#define pud_none(pud) (!pud_val(pud))
#define pud_bad(pud) (!(pud_val(pud) & 2))
#define pud_present(pud) (pud_val(pud))
+#define pud_large(pud) (0)
#define pmd_table(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
PMD_TYPE_TABLE)
#define pmd_sect(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
--
2.20.1
