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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2008-02-08 04:22:04 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:42 -0800
commit2f569afd9ced9ebec9a6eb3dbf6f83429be0a7b4 (patch)
tree23a31763887d9505e62e9d7cc8ec2fa4b86bd380 /include
parent13214adf738abc92b0a00c0763fd3be79eebaa7c (diff)
CONFIG_HIGHPTE vs. sub-page page tables.
Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/asm-alpha/page.h2
-rw-r--r--include/asm-alpha/pgalloc.h22
-rw-r--r--include/asm-arm/page.h2
-rw-r--r--include/asm-arm/pgalloc.h9
-rw-r--r--include/asm-avr32/page.h1
-rw-r--r--include/asm-avr32/pgalloc.h16
-rw-r--r--include/asm-cris/page.h1
-rw-r--r--include/asm-cris/pgalloc.h14
-rw-r--r--include/asm-frv/page.h1
-rw-r--r--include/asm-frv/pgalloc.h12
-rw-r--r--include/asm-ia64/page.h2
-rw-r--r--include/asm-ia64/pgalloc.h20
-rw-r--r--include/asm-m32r/page.h1
-rw-r--r--include/asm-m32r/pgalloc.h10
-rw-r--r--include/asm-m68k/motorola_pgalloc.h14
-rw-r--r--include/asm-m68k/page.h1
-rw-r--r--include/asm-m68k/sun3_pgalloc.h17
-rw-r--r--include/asm-mips/page.h1
-rw-r--r--include/asm-mips/pgalloc.h17
-rw-r--r--include/asm-parisc/page.h1
-rw-r--r--include/asm-parisc/pgalloc.h11
-rw-r--r--include/asm-powerpc/page.h2
-rw-r--r--include/asm-powerpc/pgalloc-32.h6
-rw-r--r--include/asm-powerpc/pgalloc-64.h27
-rw-r--r--include/asm-ppc/pgalloc.h6
-rw-r--r--include/asm-s390/page.h2
-rw-r--r--include/asm-s390/pgalloc.h3
-rw-r--r--include/asm-s390/tlb.h2
-rw-r--r--include/asm-sh/page.h2
-rw-r--r--include/asm-sh/pgalloc.h27
-rw-r--r--include/asm-sparc/page.h2
-rw-r--r--include/asm-sparc/pgalloc.h5
-rw-r--r--include/asm-sparc64/page.h2
-rw-r--r--include/asm-sparc64/pgalloc.h19
-rw-r--r--include/asm-um/page.h2
-rw-r--r--include/asm-um/pgalloc.h12
-rw-r--r--include/asm-x86/page_32.h2
-rw-r--r--include/asm-x86/page_64.h2
-rw-r--r--include/asm-x86/pgalloc_32.h6
-rw-r--r--include/asm-x86/pgalloc_64.h22
-rw-r--r--include/asm-xtensa/page.h1
-rw-r--r--include/asm-xtensa/pgalloc.h17
-rw-r--r--include/linux/mm.h14
43 files changed, 265 insertions, 93 deletions
diff --git a/include/asm-alpha/page.h b/include/asm-alpha/page.h
index 05f09f997d8..22ff9762d17 100644
--- a/include/asm-alpha/page.h
+++ b/include/asm-alpha/page.h
@@ -62,6 +62,8 @@ typedef unsigned long pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
+typedef struct page *pgtable_t;
+
#ifdef USE_48_BIT_KSEG
#define PAGE_OFFSET 0xffff800000000000UL
#else
diff --git a/include/asm-alpha/pgalloc.h b/include/asm-alpha/pgalloc.h
index fdbedacc737..fd090155dcc 100644
--- a/include/asm-alpha/pgalloc.h
+++ b/include/asm-alpha/pgalloc.h
@@ -11,10 +11,11 @@
*/
static inline void
-pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
+pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
{
pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
@@ -57,18 +58,23 @@ pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
-static inline struct page *
-pte_alloc_one(struct mm_struct *mm, unsigned long addr)
+static inline pgtable_t
+pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
- pte_t *pte = pte_alloc_one_kernel(mm, addr);
- if (pte)
- return virt_to_page(pte);
- return NULL;
+ pte_t *pte = pte_alloc_one_kernel(mm, address);
+ struct page *page;
+
+ if (!pte)
+ return NULL;
+ page = virt_to_page(pte);
+ pgtable_page_ctor(page);
+ return page;
}
static inline void
-pte_free(struct mm_struct *mm, struct page *page)
+pte_free(struct mm_struct *mm, pgtable_t page)
{
+ pgtable_page_dtor(page);
__free_page(page);
}
diff --git a/include/asm-arm/page.h b/include/asm-arm/page.h
index 31ff12f4ffb..c86f68ee651 100644
--- a/include/asm-arm/page.h
+++ b/include/asm-arm/page.h
@@ -171,6 +171,8 @@ typedef unsigned long pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
+typedef struct page *pgtable_t;
+
#endif /* CONFIG_MMU */
#include <asm/memory.h>
diff --git a/include/asm-arm/pgalloc.h b/include/asm-arm/pgalloc.h
index fb6c6e3222b..163b0305dd7 100644
--- a/include/asm-arm/pgalloc.h
+++ b/include/asm-arm/pgalloc.h
@@ -66,7 +66,7 @@ pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
return pte;
}
-static inline struct page *
+static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long addr)
{
struct page *pte;
@@ -75,6 +75,7 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr)
if (pte) {
void *page = page_address(pte);
clean_dcache_area(page, sizeof(pte_t) * PTRS_PER_PTE);
+ pgtable_page_ctor(pte);
}
return pte;
@@ -91,8 +92,9 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
}
}
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
+ pgtable_page_dtor(pte);
__free_page(pte);
}
@@ -123,10 +125,11 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
}
static inline void
-pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
+pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
{
__pmd_populate(pmdp, page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
#endif /* CONFIG_MMU */
diff --git a/include/asm-avr32/page.h b/include/asm-avr32/page.h
index ee23499cec3..5582968feee 100644
--- a/include/asm-avr32/page.h
+++ b/include/asm-avr32/page.h
@@ -34,6 +34,7 @@ extern void copy_page(void *to, void *from);
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pgd_val(x) ((x).pgd)
diff --git a/include/asm-avr32/pgalloc.h b/include/asm-avr32/pgalloc.h
index b77e364b4c4..51fc1f6e4b1 100644
--- a/include/asm-avr32/pgalloc.h
+++ b/include/asm-avr32/pgalloc.h
@@ -17,10 +17,11 @@
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
- struct page *pte)
+ pgtable_t pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables
@@ -51,7 +52,9 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm,
struct page *pte;
pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
-
+ if (!pte)
+ return NULL;
+ pgtable_page_ctor(pte);
return pte;
}
@@ -60,12 +63,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
+ pgtable_page_dtor(pte);
__free_page(pte);
}
-#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+#define __pte_free_tlb(tlb,pte) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb), pte); \
+} while (0)
#define check_pgt_cache() do { } while(0)
diff --git a/include/asm-cris/page.h b/include/asm-cris/page.h
index 3b0156c4631..c45bb1ef397 100644
--- a/include/asm-cris/page.h
+++ b/include/asm-cris/page.h
@@ -26,6 +26,7 @@
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
#endif
#define pte_val(x) ((x).pte)
diff --git a/include/asm-cris/pgalloc.h b/include/asm-cris/pgalloc.h
index 8ddd66f8177..a1ba761d057 100644
--- a/include/asm-cris/pgalloc.h
+++ b/include/asm-cris/pgalloc.h
@@ -6,6 +6,7 @@
#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, pte)
#define pmd_populate(mm, pmd, pte) pmd_set(pmd, page_address(pte))
+#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@@ -27,10 +28,11 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long ad
return pte;
}
-static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
+ pgtable_page_ctor(pte);
return pte;
}
@@ -39,13 +41,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
+ pgtable_page_dtor(pte);
__free_page(pte);
}
-
-#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+#define __pte_free_tlb(tlb,pte) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb), pte); \
+} while (0)
#define check_pgt_cache() do { } while (0)
diff --git a/include/asm-frv/page.h b/include/asm-frv/page.h
index cacc045700d..c2c1e89e747 100644
--- a/include/asm-frv/page.h
+++ b/include/asm-frv/page.h
@@ -25,6 +25,7 @@ typedef struct { unsigned long ste[64];} pmd_t;
typedef struct { pmd_t pue[1]; } pud_t;
typedef struct { pud_t pge[1]; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((x).ste[0])
diff --git a/include/asm-frv/pgalloc.h b/include/asm-frv/pgalloc.h
index e89620ef08c..971e6addb00 100644
--- a/include/asm-frv/pgalloc.h
+++ b/include/asm-frv/pgalloc.h
@@ -25,6 +25,7 @@
do { \
__set_pmd((PMD), page_to_pfn(PAGE) << PAGE_SHIFT | _PAGE_TABLE); \
} while(0)
+#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@@ -35,19 +36,24 @@ extern void pgd_free(struct mm_struct *mm, pgd_t *);
extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
-extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
+extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long)pte);
}
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
+ pgtable_page_dtor(pte);
__free_page(pte);
}
-#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+#define __pte_free_tlb(tlb,pte) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb),(pte)); \
+} while (0)
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is
diff --git a/include/asm-ia64/page.h b/include/asm-ia64/page.h
index 8a8aa3fd7cd..4999a6c6377 100644
--- a/include/asm-ia64/page.h
+++ b/include/asm-ia64/page.h
@@ -185,6 +185,7 @@ get_order (unsigned long size)
#endif
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
+ typedef struct page *pgtable_t;
# define pte_val(x) ((x).pte)
# define pmd_val(x) ((x).pmd)
@@ -206,6 +207,7 @@ get_order (unsigned long size)
typedef unsigned long pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;
+ typedef struct page *pgtable_t;
# endif
# define pte_val(x) (x)
diff --git a/include/asm-ia64/pgalloc.h b/include/asm-ia64/pgalloc.h
index 556d988123a..b9ac1a6fc21 100644
--- a/include/asm-ia64/pgalloc.h
+++ b/include/asm-ia64/pgalloc.h
@@ -70,10 +70,11 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
#define __pmd_free_tlb(tlb, pmd) pmd_free((tlb)->mm, pmd)
static inline void
-pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte)
+pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
{
pmd_val(*pmd_entry) = page_to_phys(pte);
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
@@ -81,11 +82,17 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
pmd_val(*pmd_entry) = __pa(pte);
}
-static inline struct page *pte_alloc_one(struct mm_struct *mm,
- unsigned long addr)
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr)
{
- void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
- return pg ? virt_to_page(pg) : NULL;
+ struct page *page;
+ void *pg;
+
+ pg = quicklist_alloc(0, GFP_KERNEL, NULL);
+ if (!pg)
+ return NULL;
+ page = virt_to_page(pg);
+ pgtable_page_ctor(page);
+ return page;
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
@@ -94,8 +101,9 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return quicklist_alloc(0, GFP_KERNEL, NULL);
}
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
+ pgtable_page_dtor(pte);
quicklist_free_page(0, NULL, pte);
}
diff --git a/include/asm-m32r/page.h b/include/asm-m32r/page.h
index 05d43bbbf94..8a677f3fca6 100644
--- a/include/asm-m32r/page.h
+++ b/include/asm-m32r/page.h
@@ -28,6 +28,7 @@ typedef struct { unsigned long pgd; } pgd_t;
#define PTE_MASK PAGE_MASK
typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
#define pmd_val(x) ((x).pmd)
#define pgd_val(x) ((x).pgd)
diff --git a/include/asm-m32r/pgalloc.h b/include/asm-m32r/pgalloc.h
index e5921adfad1..f11a2b909cd 100644
--- a/include/asm-m32r/pgalloc.h
+++ b/include/asm-m32r/pgalloc.h
@@ -9,10 +9,11 @@
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
- struct page *pte)
+ pgtable_t pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@@ -37,12 +38,12 @@ static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return pte;
}
-static __inline__ struct page *pte_alloc_one(struct mm_struct *mm,
+static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
-
+ pgtable_page_ctor(pte);
return pte;
}
@@ -51,8 +52,9 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
+ pgtable_page_dtor(pte);
__free_page(pte);
}
diff --git a/include/asm-m68k/motorola_pgalloc.h b/include/asm-m68k/motorola_pgalloc.h
index 500ec9b8b18..d08bf6261df 100644
--- a/include/asm-m68k/motorola_pgalloc.h
+++ b/include/asm-m68k/motorola_pgalloc.h
@@ -7,7 +7,6 @@
extern pmd_t *get_pointer_table(void);
extern int free_pointer_table(pmd_t *);
-
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
pte_t *pte;
@@ -28,7 +27,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long) pte);
}
-static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
pte_t *pte;
@@ -43,19 +42,21 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long add
nocache_page(pte);
}
kunmap(pte);
-
+ pgtable_page_ctor(page);
return page;
}
-static inline void pte_free(struct mm_struct *mm, struct page *page)
+static inline void pte_free(struct mm_struct *mm, pgtable_t page)
{
+ pgtable_page_dtor(page);
cache_page(kmap(page));
kunmap(page);
__free_page(page);
}
-static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *page)
+static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page)
{
+ pgtable_page_dtor(page);
cache_page(kmap(page));
kunmap(page);
__free_page(page);
@@ -94,10 +95,11 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *
pmd_set(pmd, pte);
}
-static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
{
pmd_set(pmd, page_address(page));
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
{
diff --git a/include/asm-m68k/page.h b/include/asm-m68k/page.h
index 3f29e2a03a4..880c2cbff8a 100644
--- a/include/asm-m68k/page.h
+++ b/include/asm-m68k/page.h
@@ -91,6 +91,7 @@ typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd[16]; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((&x)->pmd[0])
diff --git a/include/asm-m68k/sun3_pgalloc.h b/include/asm-m68k/sun3_pgalloc.h
index a5a91e72714..d4c83f14381 100644
--- a/include/asm-m68k/sun3_pgalloc.h
+++ b/include/asm-m68k/sun3_pgalloc.h
@@ -26,12 +26,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long) pte);
}
-static inline void pte_free(struct mm_struct *mm, struct page *page)
+static inline void pte_free(struct mm_struct *mm, pgtable_t page)
{
+ pgtable_page_dtor(page);
__free_page(page);
}
-#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
+#define __pte_free_tlb(tlb,pte) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb), pte); \
+} while (0)
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
@@ -45,8 +50,8 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return (pte_t *) (page);
}
-static inline struct page *pte_alloc_one(struct mm_struct *mm,
- unsigned long address)
+static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
+ unsigned long address)
{
struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
@@ -54,6 +59,7 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm,
return NULL;
clear_highpage(page);
+ pgtable_page_ctor(page);
return page;
}
@@ -63,10 +69,11 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *
pmd_val(*pmd) = __pa((unsigned long)pte);
}
-static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
+static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
{
pmd_val(*pmd) = __pa((unsigned long)page_address(page));
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is
diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index 635aa44d229..8735aa0b896 100644
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -90,6 +90,7 @@ typedef struct { unsigned long pte; } pte_t;
#define pte_val(x) ((x).pte)
#define __pte(x) ((pte_t) { (x) } )
#endif
+typedef struct page *pgtable_t;
/*
* For 3-level pagetables we defines these ourselves, for 2-level the
diff --git a/include/asm-mips/pgalloc.h b/include/asm-mips/pgalloc.h
index c4efeced839..1275831dda2 100644
--- a/include/asm-mips/pgalloc.h
+++ b/include/asm-mips/pgalloc.h
@@ -20,10 +20,11 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
- struct page *pte)
+ pgtable_t pte)
{
set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}
+#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Initialize a new pmd table with invalid pointers.
@@ -79,9 +80,10 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm,
struct page *pte;
pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
- if (pte)
+ if (pte) {
clear_highpage(pte);
-
+ pgtable_page_ctor(pte);
+ }
return pte;
}
@@ -90,12 +92,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_pages((unsigned long)pte, PTE_ORDER);
}
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
+ pgtable_page_dtor(pte);
__free_pages(pte, PTE_ORDER);
}
-#define __pte_free_tlb(tlb, pte) tlb_remove_page((tlb), (pte))
+#define __pte_free_tlb(tlb,pte) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb), pte); \
+} while (0)
#ifdef CONFIG_32BIT
diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h
index b08d9151c71..27d50b85954 100644
--- a/include/asm-parisc/page.h
+++ b/include/asm-parisc/page.h
@@ -91,6 +91,7 @@ typedef unsigned long pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
+typedef struct page *pgtable_t;
typedef struct __physmem_range {
unsigned long start_pfn;
diff --git a/include/asm-parisc/pgalloc.h b/include/asm-parisc/pgalloc.h
index aab66f1bea1..3996dfc30a3 100644
--- a/include/asm-parisc/pgalloc.h
+++ b/include/asm-parisc/pgalloc.h
@@ -115,11 +115,14 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
#define pmd_populate(mm, pmd, pte_page) \
pmd_populate_kernel(mm, pmd, page_address(pte_page))
+#define pmd_pgtable(pmd) pmd_page(pmd)
-static inline struct page *
+static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *page = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+ if (page)
+ pgtable_page_ctor(page);
return page;
}
@@ -135,7 +138,11 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
-#define pte_free(mm, page) pte_free_kernel(page_address(page))
+static inline void pte_free_kernel(struct mm_struct *mm, struct page *pte)
+{
+ pgtable_page_dtor(pte);
+ pte_free_kernel(page_address((pte));
+}
#define check_pgt_cache() do { } while (0)
diff --git a/include/asm-powerpc/page.h b/include/asm-powerpc/page.h
index 61e3725bbd3..df47bbb6ea1 100644
--- a/include/asm-powerpc/page.h
+++ b/include/asm-powerpc/page.h
@@ -190,6 +190,8 @@ extern int page_is_ram(unsigned long pfn);
struct vm_area_struct;
+typedef struct page *pgtable_t;
+
#include <asm-generic/memory_model.h>
#endif /* __ASSEMBLY__ */
diff --git a/include/asm-powerpc/pgalloc-32.h b/include/asm-powerpc/pgalloc-32.h
index c162a4c37b3..58c07147b3e 100644
--- a/include/asm-powerpc/pgalloc-32.h
+++ b/include/asm-powerpc/pgalloc-32.h
@@ -22,17 +22,19 @@ extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
#define pmd_populate(mm, pmd, pte) \
(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
+#define pmd_pgtable(pmd) pmd_page(pmd)
#else
#define pmd_populate_kernel(mm, pmd, pte) \
(pmd_val(*(pmd)) = (unsigned long)