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Subject[PATCH v3 15/34] parisc: 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 parisc, we don't support large pages, so add stubs returning 0.

CC: "James E.J. Bottomley" <jejb@parisc-linux.org>
CC: Helge Deller <deller@gmx.de>
CC: linux-parisc@vger.kernel.org
Signed-off-by: Steven Price <steven.price@arm.com>
---
arch/parisc/include/asm/pgtable.h | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index c7bb74e22436..1f38c85a9530 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -302,6 +302,7 @@ extern unsigned long *empty_zero_page;
#endif
#define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID))
#define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT)
+#define pmd_large(x) (0)
static inline void pmd_clear(pmd_t *pmd) {
#if CONFIG_PGTABLE_LEVELS == 3
if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED)
@@ -324,6 +325,7 @@ static inline void pmd_clear(pmd_t *pmd) {
#define pgd_none(x) (!pgd_val(x))
#define pgd_bad(x) (!(pgd_flag(x) & PxD_FLAG_VALID))
#define pgd_present(x) (pgd_flag(x) & PxD_FLAG_PRESENT)
+#define pgd_large(x) (0)
static inline void pgd_clear(pgd_t *pgd) {
#if CONFIG_PGTABLE_LEVELS == 3
if(pgd_flag(*pgd) & PxD_FLAG_ATTACHED)
@@ -342,6 +344,7 @@ static inline void pgd_clear(pgd_t *pgd) {
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) { }
#endif

--
2.20.1
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