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authorRussell King <rmk+kernel@arm.linux.org.uk>2011-11-22 21:30:28 +0400
committerCatalin Marinas <catalin.marinas@arm.com>2011-12-08 14:30:36 +0400
commita32618d28dbe6e9bf8ec508ccbc3561a7d7d32f0 (patch)
tree06bc43e5db2d7c05e5745a961e9698e95aa6c05d /arch/arm/include/asm/pgtable.h
parent03a6b8274cc61fb9bb77aaa102e63840461c5f3a (diff)
downloadlinux-a32618d28dbe6e9bf8ec508ccbc3561a7d7d32f0.tar.xz
ARM: pgtable: switch to use pgtable-nopud.h
Nick Piggin noted upon introducing 4level-fixup.h: | Add a temporary "fallback" header so architectures can run with | the 4level pagetables patch without modification. All architectures | should be converted to use the folding headers (include/asm-generic/ | pgtable-nop?d.h) as soon as possible, and the fallback header removed. This makes ARM compliant with this statement. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm/include/asm/pgtable.h')
-rw-r--r--arch/arm/include/asm/pgtable.h23
1 files changed, 13 insertions, 10 deletions
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h
index 03893a55e680..e14826e7efd9 100644
--- a/arch/arm/include/asm/pgtable.h
+++ b/arch/arm/include/asm/pgtable.h
@@ -11,15 +11,16 @@
#define _ASMARM_PGTABLE_H
#include <linux/const.h>
-#include <asm-generic/4level-fixup.h>
#include <asm/proc-fns.h>
#ifndef CONFIG_MMU
+#include <asm-generic/4level-fixup.h>
#include "pgtable-nommu.h"
#else
+#include <asm-generic/pgtable-nopud.h>
#include <asm/memory.h>
#include <mach/vmalloc.h>
#include <asm/pgtable-hwdef.h>
@@ -164,20 +165,22 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
#define pgd_offset_k(addr) pgd_offset(&init_mm, addr)
/*
- * The "pgd_xxx()" functions here are trivial for a folded two-level
- * setup: the pgd is never bad, and a pmd always exists (as it's folded
- * into the pgd entry)
+ * The "pud_xxx()" functions here are trivial when the pmd is folded into
+ * the pud: the pud entry is never bad, always exists, and can't be set or
+ * cleared.
*/
-#define pgd_none(pgd) (0)
-#define pgd_bad(pgd) (0)
-#define pgd_present(pgd) (1)
-#define pgd_clear(pgdp) do { } while (0)
-#define set_pgd(pgd,pgdp) do { } while (0)
+#define pud_none(pud) (0)
+#define pud_bad(pud) (0)
+#define pud_present(pud) (1)
+#define pud_clear(pudp) do { } while (0)
#define set_pud(pud,pudp) do { } while (0)
/* Find an entry in the second-level page table.. */
-#define pmd_offset(dir, addr) ((pmd_t *)(dir))
+static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
+{
+ return (pmd_t *)pud;
+}
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_present(pmd) (pmd_val(pmd))