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Subject[PATCH v3 09/34] m68k: mm: Add p?d_large() definitions
Date
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 is provided by the
p?d_large() functions/macros.

For m68k, we don't support large pages, so add stubs returning 0

CC: Geert Uytterhoeven <geert@linux-m68k.org>
CC: linux-m68k@lists.linux-m68k.org
Signed-off-by: Steven Price <steven.price@arm.com>
---
arch/m68k/include/asm/mcf_pgtable.h | 2 ++
arch/m68k/include/asm/motorola_pgtable.h | 2 ++
arch/m68k/include/asm/pgtable_no.h | 1 +
arch/m68k/include/asm/sun3_pgtable.h | 2 ++
4 files changed, 7 insertions(+)

diff --git a/arch/m68k/include/asm/mcf_pgtable.h b/arch/m68k/include/asm/mcf_pgtable.h
index 5d5502cb2b2d..63827d28a017 100644
--- a/arch/m68k/include/asm/mcf_pgtable.h
+++ b/arch/m68k/include/asm/mcf_pgtable.h
@@ -196,11 +196,13 @@ static inline int pmd_none2(pmd_t *pmd) { return !pmd_val(*pmd); }
static inline int pmd_bad2(pmd_t *pmd) { return 0; }
#define pmd_bad(pmd) pmd_bad2(&(pmd))
#define pmd_present(pmd) (!pmd_none2(&(pmd)))
+#define pmd_large(pmd) (0)
static inline void pmd_clear(pmd_t *pmdp) { pmd_val(*pmdp) = 0; }

static inline int pgd_none(pgd_t pgd) { return 0; }
static inline int pgd_bad(pgd_t pgd) { return 0; }
static inline int pgd_present(pgd_t pgd) { return 1; }
+static inline int pgd_large(pgd_t pgd) { return 0; }
static inline void pgd_clear(pgd_t *pgdp) {}

#define pte_ERROR(e) \
diff --git a/arch/m68k/include/asm/motorola_pgtable.h b/arch/m68k/include/asm/motorola_pgtable.h
index 7f66a7bad7a5..a649eb8a91de 100644
--- a/arch/m68k/include/asm/motorola_pgtable.h
+++ b/arch/m68k/include/asm/motorola_pgtable.h
@@ -138,6 +138,7 @@ static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_bad(pmd) ((pmd_val(pmd) & _DESCTYPE_MASK) != _PAGE_TABLE)
#define pmd_present(pmd) (pmd_val(pmd) & _PAGE_TABLE)
+#define pmd_large(pmd) (0)
#define pmd_clear(pmdp) ({ \
unsigned long *__ptr = pmdp->pmd; \
short __i = 16; \
@@ -150,6 +151,7 @@ static inline void pgd_set(pgd_t *pgdp, pmd_t *pmdp)
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) ((pgd_val(pgd) & _DESCTYPE_MASK) != _PAGE_TABLE)
#define pgd_present(pgd) (pgd_val(pgd) & _PAGE_TABLE)
+#define pgd_large(pgd) (0)
#define pgd_clear(pgdp) ({ pgd_val(*pgdp) = 0; })
#define pgd_page(pgd) (mem_map + ((unsigned long)(__va(pgd_val(pgd)) - PAGE_OFFSET) >> PAGE_SHIFT))

diff --git a/arch/m68k/include/asm/pgtable_no.h b/arch/m68k/include/asm/pgtable_no.h
index fc3a96c77bd8..eeef17b2eae8 100644
--- a/arch/m68k/include/asm/pgtable_no.h
+++ b/arch/m68k/include/asm/pgtable_no.h
@@ -17,6 +17,7 @@
* Trivial page table functions.
*/
#define pgd_present(pgd) (1)
+#define pgd_large(pgd) (0)
#define pgd_none(pgd) (0)
#define pgd_bad(pgd) (0)
#define pgd_clear(pgdp)
diff --git a/arch/m68k/include/asm/sun3_pgtable.h b/arch/m68k/include/asm/sun3_pgtable.h
index c987d50866b4..eea72e3515db 100644
--- a/arch/m68k/include/asm/sun3_pgtable.h
+++ b/arch/m68k/include/asm/sun3_pgtable.h
@@ -143,6 +143,7 @@ static inline int pmd_bad2 (pmd_t *pmd) { return 0; }
static inline int pmd_present2 (pmd_t *pmd) { return pmd_val (*pmd) & SUN3_PMD_VALID; }
/* #define pmd_present(pmd) pmd_present2(&(pmd)) */
#define pmd_present(pmd) (!pmd_none2(&(pmd)))
+#define pmd_large(pmd) (0)
static inline void pmd_clear (pmd_t *pmdp) { pmd_val (*pmdp) = 0; }

static inline int pgd_none (pgd_t pgd) { return 0; }
@@ -150,6 +151,7 @@ static inline int pgd_bad (pgd_t pgd) { return 0; }
static inline int pgd_present (pgd_t pgd) { return 1; }
static inline void pgd_clear (pgd_t *pgdp) {}

+static inline int pgd_large(pgd_t pgd) { return 0; }

#define pte_ERROR(e) \
pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
--
2.20.1
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