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>

diff --git a/arch/frv/mm/pgalloc.c b/arch/frv/mm/pgalloc.c
index 1a2e5c8d03a9c7e639ab354705a08cb0916bb443..66f616fb4860a779d5cc1eafa68d48d41b4db0e2 100644 (file)
--- a/arch/frv/mm/pgalloc.c
+++ b/arch/frv/mm/pgalloc.c
@@ -28,7 +28,7 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
        return pte;
 }
 
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
        struct page *page;
 
@@ -37,9 +37,11 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
 #else
        page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
 #endif
-       if (page)
+       if (page) {
                clear_highpage(page);
-       flush_dcache_page(page);
+               pgtable_page_ctor(page);
+               flush_dcache_page(page);
+       }
        return page;
 }
 

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index f80f90c4d58be2b277dd6bb6d602b43678b6dbad..ac3390f81900c64192c70a14e1a10258201c7090 100644 (file)
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -107,19 +107,20 @@ __init_refok pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long add
        return pte;
 }
 
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
        struct page *ptepage;
 
 #ifdef CONFIG_HIGHPTE
-       gfp_t flags = GFP_KERNEL | __GFP_HIGHMEM | __GFP_REPEAT;
+       gfp_t flags = GFP_KERNEL | __GFP_HIGHMEM | __GFP_REPEAT | __GFP_ZERO;
 #else
-       gfp_t flags = GFP_KERNEL | __GFP_REPEAT;
+       gfp_t flags = GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO;
 #endif
 
        ptepage = alloc_pages(flags, 0);
-       if (ptepage)
-               clear_highpage(ptepage);
+       if (!ptepage)
+               return NULL;
+       pgtable_page_ctor(ptepage);
        return ptepage;
 }
 
@@ -131,11 +132,12 @@ void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
        free_page((unsigned long)pte);
 }
 
-void pte_free(struct mm_struct *mm, struct page *ptepage)
+void pte_free(struct mm_struct *mm, pgtable_t ptepage)
 {
 #ifdef CONFIG_SMP
        hash_page_sync();
 #endif
+       pgtable_page_dtor(ptepage);
        __free_page(ptepage);
 }
 

diff --git a/arch/ppc/mm/pgtable.c b/arch/ppc/mm/pgtable.c
index 409fcaa4994a598736ec082218dacde0709f2d9a..03a79bff1271fee749e842d56ca21df176e2674d 100644 (file)
--- a/arch/ppc/mm/pgtable.c
+++ b/arch/ppc/mm/pgtable.c
@@ -95,7 +95,7 @@ __init_refok pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long add
        return pte;
 }
 
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
        struct page *ptepage;
 
@@ -106,8 +106,10 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
 #endif
 
        ptepage = alloc_pages(flags, 0);
-       if (ptepage)
+       if (ptepage) {
                clear_highpage(ptepage);
+               pgtable_page_ctor(ptepage);
+       }
        return ptepage;
 }
 
@@ -119,11 +121,12 @@ void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
        free_page((unsigned long)pte);
 }
 
-void pte_free(struct mm_struct *mm, struct page *ptepage)
+void pte_free(struct mm_struct *mm, pgtable_t ptepage)
 {
 #ifdef CONFIG_SMP
        hash_page_sync();
 #endif
+       pgtable_page_dtor(ptepage);
        __free_page(ptepage);
 }
 

diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index e60e0ae134025f4ef0b4bcbab65c48ca32cb6f60..019f518cd5a0c014c2e12db2e96274c5f65066d2 100644 (file)
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -78,6 +78,7 @@ unsigned long *page_table_alloc(int noexec)
                clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
                page->index = (addr_t) table;
        }
+       pgtable_page_ctor(page);
        table = (unsigned long *) page_to_phys(page);
        clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
        return table;
@@ -87,6 +88,7 @@ void page_table_free(unsigned long *table)
 {
        unsigned long *shadow = get_shadow_pte(table);
 
+       pgtable_page_dtor(virt_to_page(table));
        if (shadow)
                free_page((unsigned long) shadow);
        free_page((unsigned long) table);

diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index dc98e3844a0a94363e1c9c5dc3f74e5522ce43a2..23d3291a3e81e65736c862e03e3b24e3047ffa22 100644 (file)
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -489,14 +489,17 @@ srmmu_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
        return (pte_t *)srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
 }
 
-static struct page *
+static pgtable_t
 srmmu_pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
        unsigned long pte;
+       struct page *page;
 
        if ((pte = (unsigned long)srmmu_pte_alloc_one_kernel(mm, address)) == 0)
                return NULL;
-       return pfn_to_page( __nocache_pa(pte) >> PAGE_SHIFT );
+       page = pfn_to_page( __nocache_pa(pte) >> PAGE_SHIFT );
+       pgtable_page_ctor(page);
+       return page;
 }
 
 static void srmmu_free_pte_fast(pte_t *pte)
@@ -504,10 +507,11 @@ static void srmmu_free_pte_fast(pte_t *pte)
        srmmu_free_nocache((unsigned long)pte, PTE_SIZE);
 }
 
-static void srmmu_pte_free(struct page *pte)
+static void srmmu_pte_free(pgtable_t pte)
 {
        unsigned long p;
 
+       pgtable_page_dtor(pte);
        p = (unsigned long)page_address(pte);   /* Cached address (for test) */
        if (p == 0)
                BUG();

diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c
index 0729305f2f594a83ff6259ec1e5e223ba51ab30c..c0442e8c4b1548a784037d1dbe223e996dcefd95 100644 (file)
--- a/arch/sparc/mm/sun4c.c
+++ b/arch/sparc/mm/sun4c.c
@@ -1947,12 +1947,17 @@ static pte_t *sun4c_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long add
        return pte;
 }
 
-static struct page *sun4c_pte_alloc_one(struct mm_struct *mm, unsigned long address)
+static pgtable_t sun4c_pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
-       pte_t *pte = sun4c_pte_alloc_one_kernel(mm, address);
+       pte_t *pte;
+       struct page *page;
+
+       pte = sun4c_pte_alloc_one_kernel(mm, address);
        if (pte == NULL)
                return NULL;
-       return virt_to_page(pte);
+       page = virt_to_page(pte);
+       pgtable_page_ctor(page);
+       return page;
 }
 
 static inline void sun4c_free_pte_fast(pte_t *pte)
@@ -1962,8 +1967,9 @@ static inline void sun4c_free_pte_fast(pte_t *pte)
        pgtable_cache_size++;
 }
 
-static void sun4c_pte_free(struct page *pte)
+static void sun4c_pte_free(pgtable_t pte)
 {
+       pgtable_page_dtor(pte);
        sun4c_free_pte_fast(page_address(pte));
 }
 

diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index d872fdce1d7ec76e9d4b37782b2a9ac9dd108395..2627ce82e918887f2fdf4ad9d9031fd4d6ac26ad 100644 (file)
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -354,11 +354,13 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
        return pte;
 }
 
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
        struct page *pte;
 
        pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+       if (pte)
+               pgtable_page_ctor(pte);
        return pte;
 }
 

diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index 6c1914622a88344456f571d2cbf06e58921f451b..73aba7125203764b41a3cb3af48ac6d5d5cee5a4 100644 (file)
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -183,7 +183,7 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
        return (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
 }
 
-struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
        struct page *pte;
 
@@ -192,6 +192,8 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
 #else
        pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
 #endif
+       if (pte)
+               pgtable_page_ctor(pte);
        return pte;
 }
 
@@ -365,6 +367,7 @@ void check_pgt_cache(void)
 
 void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
 {
+       pgtable_page_dtor(pte);
        paravirt_release_pt(page_to_pfn(pte));
        tlb_remove_page(tlb, pte);
 }

diff --git a/include/asm-alpha/page.h b/include/asm-alpha/page.h
index 05f09f997d829429f0ece5af420105299997afd0..22ff9762d17b63b8379abea371cb816d37dcaae2 100644 (file)
--- 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 fdbedacc7375158990236e13b546a7fa1c92a8a6..fd090155dccd14367fcde13c425f5d224de7eb21 100644 (file)
--- 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 31ff12f4ffb7b5fdb757767a159c4f855c544630..c86f68ee65118b6c7cdd2fec34ee7509abbaae46 100644 (file)
--- 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 fb6c6e3222bddc19131fc59408e12ffbfb824a22..163b0305dd76b3e83176f294eb204d3a389bd3ad 100644 (file)
--- 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 ee23499cec34df071b4c6a75ae189ed08797f7df..5582968feee853220432ac4b503c038c4beb7d0f 100644 (file)
--- 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 b77e364b4c444a164c9741d2d6ab94df1dfc2e35..51fc1f6e4b17afb9d73b7065ad6bea459549d205 100644 (file)
--- 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 3b0156c4631107dc91dc13dd86468f2dff2c91ca..c45bb1ef397cb3466c2d836f8fc1679ba69d4a9d 100644 (file)
--- 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 8ddd66f8177346aeba8c6dd42bf1d313e2355b0a..a1ba761d0573637ffb79ff4f9d6624d644dad9ce 100644 (file)
--- 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 cacc045700de98eb36f156738cb12b2c24f0ad36..c2c1e89e747d248d78c0a7535fe2b4f11740edb7 100644 (file)
--- 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 e89620ef08cab876e315ec845d6c96d0d6e1cc97..971e6addb0095a4175d86b68715937e918d2f474 100644 (file)
--- 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 8a8aa3fd7cd4493dfa6060418bed502cf1bd5227..4999a6c63775b87f4432378c6774e74f2ae2bfb0 100644 (file)
--- 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 556d988123ac1cd5ba351396caf39479401450b0..b9ac1a6fc21694a55e2771e471ab8cc90ab997cf 100644 (file)
--- 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 05d43bbbf940b022b140edb86256526ea338c620..8a677f3fca683d658dc41c6306ff6828f9df6390 100644 (file)
--- 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 e5921adfad1b6ae2490fb89aa61689f9eaf20b5e..f11a2b909cdbf8ab3bc1a11195b0160173c2a58b 100644 (file)
--- 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 500ec9b8b1892aebb41ec8833fa982abf5acaf9f..d08bf6261df88889f0e39091f8356580920208bb 100644 (file)
--- 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 3f29e2a03a43bd203d34c633ed2c5a5749b35b4e..880c2cbff8a681cc8619ef50f5b26cd5fd202433 100644 (file)
--- 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 a5a91e72714b0b9e715bba4ee0a008a777187057..d4c83f14381652402d35f4b3cb5fb5967f97a6de 100644 (file)
--- 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 635aa44d2290dfcb85b056015341ff0580d232b3..8735aa0b89630987f9d7341efa88e13a4bf9eb7a 100644 (file)
--- 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 c4efeced8396da58d0bad7b56fc4f2da50d2f753..1275831dda29b65ae90d2046f781a747cb4a3df0 100644 (file)
--- 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 b08d9151c71e4495b1ed9b8884199b92f7c007da..27d50b85954109d123a8e9118a8799a4eadc5221 100644 (file)
--- 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 aab66f1bea14d67c3381d39ba6bd0d15550467b7..3996dfc30a3f3366aebd714d63b35fb8455fcbac 100644 (file)
--- 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 61e3725bbd37e18eae791ed2b3cf36e3d045b2eb..df47bbb6ea1348e6c6ad95898baa911e819823b7 100644 (file)
--- 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 c162a4c37b39ce5df12573c209dfd3a1edbdd59b..58c07147b3ea445c17851c8cb5ab8489a6432805 100644 (file)
--- 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)pte | _PMD_PRESENT)
 #define pmd_populate(mm, pmd, pte)     \
                (pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
+#define pmd_pgtable(pmd) pmd_page(pmd)
 #endif
 
 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
-extern struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr);
+extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
 extern void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
-extern void pte_free(struct mm_struct *mm, struct page *pte);
+extern void pte_free(struct mm_struct *mm, pgtable_t pte);
 
 #define __pte_free_tlb(tlb, pte)       pte_free((tlb)->mm, (pte))
 

diff --git a/include/asm-powerpc/pgalloc-64.h b/include/asm-powerpc/pgalloc-64.h
index 5afae8593931e5cf4966688307488adfc856a38b..68980990f62a764f3896cfe95830d412f98cf824 100644 (file)
--- a/include/asm-powerpc/pgalloc-64.h
+++ b/include/asm-powerpc/pgalloc-64.h
@@ -58,6 +58,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
 #define pmd_populate(mm, pmd, pte_page) \
        pmd_populate_kernel(mm, pmd, page_address(pte_page))
 #define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
+#define pmd_pgtable(pmd) pmd_page(pmd)
 
 
 #else /* CONFIG_PPC_64K_PAGES */
@@ -72,6 +73,7 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
 
 #define pmd_populate(mm, pmd, pte_page) \
        pmd_populate_kernel(mm, pmd, page_address(pte_page))
+#define pmd_pgtable(pmd) pmd_page(pmd)
 
 #endif /* CONFIG_PPC_64K_PAGES */
 
@@ -92,11 +94,18 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
         return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
 }
 
-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)
 {
-       pte_t *pte = pte_alloc_one_kernel(mm, address);
-       return pte ? virt_to_page(pte) : NULL;
+       struct page *page;
+       pte_t *pte;
+
+       pte = pte_alloc_one_kernel(mm, address);
+       if (!pte)
+               return NULL;
+       page = virt_to_page(pte);
+       pgtable_page_ctor(page);
+       return page;
 }
 
 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@@ -104,8 +113,9 @@ 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 *ptepage)
+static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
 {
+       pgtable_page_dtor(ptepage);
        __free_page(ptepage);
 }
 
@@ -136,9 +146,12 @@ static inline void pgtable_free(pgtable_free_t pgf)
 
 extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
 
-#define __pte_free_tlb(tlb, ptepage)   \
+#define __pte_free_tlb(tlb,ptepage)    \
+do { \
+       pgtable_page_dtor(ptepage); \
        pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
-               PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1))
+               PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
+} while (0)
 #define __pmd_free_tlb(tlb, pmd)       \
        pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
                PMD_CACHE_NUM, PMD_TABLE_SIZE-1))

diff --git a/include/asm-ppc/pgalloc.h b/include/asm-ppc/pgalloc.h
index 7c39a95829c7263932cf445fe94200c050991df4..fd4d1d74cfb1da92f1714e30755ef228ba3fb275 100644 (file)
--- a/include/asm-ppc/pgalloc.h
+++ b/include/asm-ppc/pgalloc.h
@@ -23,17 +23,19 @@ 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)pte | _PMD_PRESENT)
 #define pmd_populate(mm, pmd, pte)     \
                (pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
+#define pmd_pgtable(pmd) pmd_page(pmd)
 #endif
 
 extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
-extern struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr);
+extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
 extern void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
-extern void pte_free(struct mm_struct *mm, struct page *pte);
+extern void pte_free(struct mm_struct *mm, pgtable_t pte);
 
 #define __pte_free_tlb(tlb, pte)       pte_free((tlb)->mm, (pte))
 

diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h
index a55f9d979dfb0a29aa87d8b61c2d1680529bc31c..7f29a981f48c78580bc80060bc72c798e7599ce7 100644 (file)
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -109,6 +109,8 @@ typedef struct { unsigned long pgd; } pgd_t;
 
 #endif /* __s390x__ */
 
+typedef struct page *pgtable_t;
+
 #define __pte(x)        ((pte_t) { (x) } )
 #define __pmd(x)        ((pmd_t) { (x) } )
 #define __pgd(x)        ((pgd_t) { (x) } )

diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h
index 6f6619ba898062c6af642c83dd574eda02c0e6c6..900d44807e107bf2d8ce042b433cad88bf50f7e3 100644 (file)
--- a/include/asm-s390/pgalloc.h
+++ b/include/asm-s390/pgalloc.h
@@ -132,7 +132,7 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 }
 
 static inline void
-pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
+pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
 {
        pte_t *pte = (pte_t *)page_to_phys(page);
        pmd_t *shadow_pmd = get_shadow_table(pmd);
@@ -142,6 +142,7 @@ pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
        if (shadow_pmd && shadow_pte)
                pmd_populate_kernel(mm, shadow_pmd, shadow_pte);
 }
+#define pmd_pgtable(pmd) pmd_page(pmd)
 
 /*
  * page table entry allocation/free routines.

diff --git a/include/asm-s390/tlb.h b/include/asm-s390/tlb.h
index 985de2b88279c99a563d85635af1ccec07fc0a6c..3c8177fa9e06e9b0b7800f14ce112917b9843dcc 100644 (file)
--- a/include/asm-s390/tlb.h
+++ b/include/asm-s390/tlb.h
@@ -95,7 +95,7 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
  * pte_free_tlb frees a pte table and clears the CRSTE for the
  * page table from the tlb.
  */
-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)
 {
        if (!tlb->fullmm) {
                tlb->array[tlb->nr_ptes++] = page;

diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
index e0fe02950f522b067d75bd8cf4f2d5ecbfeaf41c..134562dc8c4547224739ef99c819c91c39d4659c 100644 (file)
--- a/include/asm-sh/page.h
+++ b/include/asm-sh/page.h
@@ -100,6 +100,8 @@ typedef struct { unsigned long pgd; } pgd_t;
 #define __pgd(x) ((pgd_t) { (x) } )
 #define __pgprot(x)    ((pgprot_t) { (x) } )
 
+typedef struct page *pgtable_t;
+
 #endif /* !__ASSEMBLY__ */
 
 /*

diff --git a/include/asm-sh/pgalloc.h b/include/asm-sh/pgalloc.h
index 59ca16d77a1d79b20775362e8d76d7d9cc2d3594..84dd2db7104c74f4f57eb4f1c7d0bfc1f4159869 100644 (file)
--- a/include/asm-sh/pgalloc.h
+++ b/include/asm-sh/pgalloc.h
@@ -14,10 +14,11 @@ 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)
 
 static inline void pgd_ctor(void *x)
 {
@@ -47,11 +48,18 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
        return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
 }
 
-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)
 {
-       void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
-       return pg ? virt_to_page(pg) : NULL;
+       struct page *page;
+       void *pg;
+
+       pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
+       if (!pg)
+               return NULL;
+       page = virt_to_page(pg);
+       pgtable_page_ctor(page);
+       return page;
 }
 
 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@@ -59,12 +67,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
        quicklist_free(QUICK_PT, NULL, 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);
        quicklist_free_page(QUICK_PT, NULL, 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-sparc/page.h b/include/asm-sparc/page.h
index cbc48c0c4e15324fdafe23640036a5127315eea1..39ccf2da297c757e6b9e47f60d3dddec04bb4da4 100644 (file)
--- a/include/asm-sparc/page.h
+++ b/include/asm-sparc/page.h
@@ -123,6 +123,8 @@ typedef unsigned long iopgprot_t;
 
 #endif
 
+typedef struct page *pgtable_t;
+
 extern unsigned long sparc_unmapped_base;
 
 BTFIXUPDEF_SETHI(sparc_unmapped_base)

diff --git a/include/asm-sparc/pgalloc.h b/include/asm-sparc/pgalloc.h
index b5fbdd36447fbf2b69f384957b76962731553645..6292cd00e5affdd8f913ddbfc1dbf290795384ac 100644 (file)
--- a/include/asm-sparc/pgalloc.h
+++ b/include/asm-sparc/pgalloc.h
@@ -50,10 +50,11 @@ BTFIXUPDEF_CALL(void, free_pmd_fast, pmd_t *)
 
 BTFIXUPDEF_CALL(void, pmd_populate, pmd_t *, struct page *)
 #define pmd_populate(MM, PMD, PTE)        BTFIXUP_CALL(pmd_populate)(PMD, PTE)
+#define pmd_pgtable(pmd) pmd_page(pmd)
 BTFIXUPDEF_CALL(void, pmd_set, pmd_t *, pte_t *)
 #define pmd_populate_kernel(MM, PMD, PTE) BTFIXUP_CALL(pmd_set)(PMD, PTE)
 
-BTFIXUPDEF_CALL(struct page *, pte_alloc_one, struct mm_struct *, unsigned long)
+BTFIXUPDEF_CALL(pgtable_t , pte_alloc_one, struct mm_struct *, unsigned long)
 #define pte_alloc_one(mm, address)     BTFIXUP_CALL(pte_alloc_one)(mm, address)
 BTFIXUPDEF_CALL(pte_t *, pte_alloc_one_kernel, struct mm_struct *, unsigned long)
 #define pte_alloc_one_kernel(mm, addr) BTFIXUP_CALL(pte_alloc_one_kernel)(mm, addr)
@@ -61,7 +62,7 @@ BTFIXUPDEF_CALL(pte_t *, pte_alloc_one_kernel, struct mm_struct *, unsigned long
 BTFIXUPDEF_CALL(void, free_pte_fast, pte_t *)
 #define pte_free_kernel(mm, pte)       BTFIXUP_CALL(free_pte_fast)(pte)
 
-BTFIXUPDEF_CALL(void, pte_free, struct page *)
+BTFIXUPDEF_CALL(void, pte_free, pgtable_t )
 #define pte_free(mm, pte)      BTFIXUP_CALL(pte_free)(pte)
 #define __pte_free_tlb(tlb, pte)       pte_free((tlb)->mm, pte)
 

diff --git a/include/asm-sparc64/page.h b/include/asm-sparc64/page.h
index cdf950e017eeebad8cb7e553953ac8808ec188ec..e93a482aa24a0b874c50a2d109bf55f6b9c28fdc 100644 (file)
--- a/include/asm-sparc64/page.h
+++ b/include/asm-sparc64/page.h
@@ -104,6 +104,8 @@ typedef unsigned long pgprot_t;
 
 #endif /* (STRICT_MM_TYPECHECKS) */
 
+typedef struct page *pgtable_t;
+
 #define TASK_UNMAPPED_BASE     (test_thread_flag(TIF_32BIT) ? \
                                 (_AC(0x0000000070000000,UL)) : \
                                 (_AC(0xfffff80000000000,UL) + (1UL << 32UL)))

diff --git a/include/asm-sparc64/pgalloc.h b/include/asm-sparc64/pgalloc.h
index b48f73c2274ef7ee682204deffa9bcd09dad962f..3ee2d406373b9fc03a671d2c28b49adbb91dd634 100644 (file)
--- a/include/asm-sparc64/pgalloc.h
+++ b/include/asm-sparc64/pgalloc.h
@@ -43,11 +43,18 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
        return quicklist_alloc(0, GFP_KERNEL, NULL);
 }
 
-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)
 {
-       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 void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@@ -55,8 +62,9 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
        quicklist_free(0, NULL, pte);
 }
 
-static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
+static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
 {
+       pgtable_page_dtor(ptepage);
        quicklist_free_page(0, NULL, ptepage);
 }
 
@@ -64,6 +72,7 @@ static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
 #define pmd_populate_kernel(MM, PMD, PTE)      pmd_set(PMD, 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 void check_pgt_cache(void)
 {

diff --git a/include/asm-um/page.h b/include/asm-um/page.h
index fe2374d705d15af36114379cfa5e4192a1125aca..381f96b1c8259153fca3433c9eca220031fa1e63 100644 (file)
--- a/include/asm-um/page.h
+++ b/include/asm-um/page.h
@@ -79,6 +79,8 @@ typedef unsigned long phys_t;
 
 typedef struct { unsigned long pgprot; } pgprot_t;
 
+typedef struct page *pgtable_t;
+
 #define pgd_val(x)     ((x).pgd)
 #define pgprot_val(x)  ((x).pgprot)
 

diff --git a/include/asm-um/pgalloc.h b/include/asm-um/pgalloc.h
index 4f3e62b02861f0a743a3ffe45f280e127b0c7f01..9062a6e72241f60235b0c6f4c2bd41dd9c00ab6d 100644 (file)
--- a/include/asm-um/pgalloc.h
+++ b/include/asm-um/pgalloc.h
@@ -18,6 +18,7 @@
        set_pmd(pmd, __pmd(_PAGE_TABLE +                        \
                ((unsigned long long)page_to_pfn(pte) <<        \
                        (unsigned long long) PAGE_SHIFT)))
+#define pmd_pgtable(pmd) pmd_page(pmd)
 
 /*
  * Allocate and free page tables.
@@ -26,19 +27,24 @@ extern pgd_t *pgd_alloc(struct mm_struct *);
 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
 
 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)
 
 #ifdef CONFIG_3_LEVEL_PGTABLES
 

diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index a6fd10f230d2e628660e252bda6623bc3840f67f..ba715d9798b093aeee1a50aecf5373caf8930835 100644 (file)
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -50,6 +50,8 @@ typedef unsigned long phys_addr_t;
 typedef union { pteval_t pte, pte_low; } pte_t;
 typedef pte_t boot_pte_t;
 
+typedef struct page *pgtable_t;
+
 #endif /* __ASSEMBLY__ */
 #endif /* CONFIG_X86_PAE */
 

diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
index dcf0c0746075ba07f4527f2018bb846f8ebf8424..f7393bc516eff1c1d25ad799f0441f734a151280 100644 (file)
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -71,6 +71,8 @@ typedef unsigned long pgdval_t;
 typedef unsigned long  pgprotval_t;
 typedef unsigned long  phys_addr_t;
 
+typedef struct page *pgtable_t;
+
 typedef struct { pteval_t pte; } pte_t;
 
 #define vmemmap ((struct page *)VMEMMAP_START)

diff --git a/include/asm-x86/pgalloc_32.h b/include/asm-x86/pgalloc_32.h
index bab12718a913fa446f25c8c9e6e2b2d380e3761a..6bea6e5b5ee55044dd06bea1b55677bf9cba20bf 100644 (file)
--- a/include/asm-x86/pgalloc_32.h
+++ b/include/asm-x86/pgalloc_32.h
@@ -31,6 +31,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *p
        paravirt_alloc_pt(mm, pfn);
        set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
 }
+#define pmd_pgtable(pmd) pmd_page(pmd)
 
 /*
  * Allocate and free page tables.
@@ -39,15 +40,16 @@ extern pgd_t *pgd_alloc(struct mm_struct *);
 extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
 
 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);
 }
 

diff --git a/include/asm-x86/pgalloc_64.h b/include/asm-x86/pgalloc_64.h
index 4f6220db22b110bbf1606d75316a36e1b458fa1a..8d6722320dccd7818383abe4445eef5b9bc85f0c 100644 (file)
--- a/include/asm-x86/pgalloc_64.h
+++ b/include/asm-x86/pgalloc_64.h
@@ -12,6 +12,8 @@
 #define pgd_populate(mm, pgd, pud) \
                set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)))
 
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
 {
        set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
@@ -91,12 +93,17 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long ad
        return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
 }
 
-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)
 {
-       void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
+       struct page *page;
+       void *p;
+
+       p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
        if (!p)
                return NULL;
-       return virt_to_page(p);
+       page = virt_to_page(p);
+       pgtable_page_ctor(page);
+       return page;
 }
 
 /* Should really implement gc for free page table pages. This could be
@@ -108,12 +115,17 @@ 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 __pmd_free_tlb(tlb,x)   tlb_remove_page((tlb),virt_to_page(x))
 #define __pud_free_tlb(tlb,x)   tlb_remove_page((tlb),virt_to_page(x))

diff --git a/include/asm-xtensa/page.h b/include/asm-xtensa/page.h
index 1adedbf41d019acd775bd1c8b3b61f664d649979..80a6ae0dd25957e548d53b4c3e125f32df042ba9 100644 (file)
--- a/include/asm-xtensa/page.h
+++ b/include/asm-xtensa/page.h
@@ -98,6 +98,7 @@
 typedef struct { unsigned long pte; } pte_t;           /* page table entry */
 typedef struct { unsigned long pgd; } pgd_t;           /* PGD table entry */
 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-xtensa/pgalloc.h b/include/asm-xtensa/pgalloc.h
index 1d51ba5463f9f2f215015c598b5ef51bb7ff06f2..8d1544eb461ebfa13b3cd352786ba2af6fcf077e 100644 (file)
--- a/include/asm-xtensa/pgalloc.h
+++ b/include/asm-xtensa/pgalloc.h
@@ -24,6 +24,7 @@
        (pmd_val(*(pmdp)) = ((unsigned long)ptep))
 #define pmd_populate(mm, pmdp, page)                                        \
        (pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
+#define pmd_pgtable(pmd) pmd_page(pmd)
 
 static inline pgd_t*
 pgd_alloc(struct mm_struct *mm)
@@ -46,10 +47,14 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
        return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
 }
 
-static inline struct page *pte_alloc_one(struct mm_struct *mm, 
-                                        unsigned long addr)
+static inline pte_token_t pte_alloc_one(struct mm_struct *mm,
+                                       unsigned long addr)
 {
-       return virt_to_page(pte_alloc_one_kernel(mm, addr));
+       struct page *page;
+
+       page = virt_to_page(pte_alloc_one_kernel(mm, addr));
+       pgtable_page_ctor(page);
+       return page;
 }
 
 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@@ -57,10 +62,12 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
        kmem_cache_free(pgtable_cache, pte);
 }
 
-static inline void pte_free(struct mm_struct *mm, struct page *page)
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
 {
-       kmem_cache_free(pgtable_cache, page_address(page));
+       pgtable_page_dtor(pte);
+       kmem_cache_free(pgtable_cache, page_address(pte));
 }
+#define pmd_pgtable(pmd) pmd_page(pmd)
 
 #endif /* __KERNEL__ */
 #endif /* _XTENSA_PGALLOC_H */

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 89d7c691b93a6a660ee5468ac333a805b049a6f7..e8abb3814209f556a06750af5ba3941ed0796eda 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -894,6 +894,18 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
 #define pte_lockptr(mm, pmd)   ({(void)(pmd); &(mm)->page_table_lock;})
 #endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
 
+static inline void pgtable_page_ctor(struct page *page)
+{
+       pte_lock_init(page);
+       inc_zone_page_state(page, NR_PAGETABLE);
+}
+
+static inline void pgtable_page_dtor(struct page *page)
+{
+       pte_lock_deinit(page);
+       dec_zone_page_state(page, NR_PAGETABLE);
+}
+
 #define pte_offset_map_lock(mm, pmd, address, ptlp)    \
 ({                                                     \
        spinlock_t *__ptl = pte_lockptr(mm, pmd);       \
@@ -1136,7 +1148,7 @@ struct page *follow_page(struct vm_area_struct *, unsigned long address,
 #define FOLL_GET       0x04    /* do get_page on page */
 #define FOLL_ANON      0x08    /* give ZERO_PAGE if no pgtable */
 
-typedef int (*pte_fn_t)(pte_t *pte, struct page *pmd_page, unsigned long addr,
+typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
                        void *data);
 extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
                               unsigned long size, pte_fn_t fn, void *data);

diff --git a/mm/memory.c b/mm/memory.c
index 153a54b2013ca9927edf1dda4e047a82a952c05e..e5628a5fd678ff2b8faa02521e49cec4d769970e 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -134,11 +134,9 @@ void pmd_clear_bad(pmd_t *pmd)
  */
 static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd)
 {
-       struct page *page = pmd_page(*pmd);
+       pgtable_t token = pmd_pgtable(*pmd);
        pmd_clear(pmd);
-       pte_lock_deinit(page);
-       pte_free_tlb(tlb, page);
-       dec_zone_page_state(page, NR_PAGETABLE);
+       pte_free_tlb(tlb, token);
        tlb->mm->nr_ptes--;
 }
 
@@ -309,21 +307,19 @@ void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *vma,
 
 int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address)
 {
-       struct page *new = pte_alloc_one(mm, address);
+       pgtable_t new = pte_alloc_one(mm, address);
        if (!new)
                return -ENOMEM;
 
-       pte_lock_init(new);
        spin_lock(&mm->page_table_lock);
-       if (pmd_present(*pmd)) {        /* Another has populated it */
-               pte_lock_deinit(new);
-               pte_free(mm, new);
-       } else {
+       if (!pmd_present(*pmd)) {       /* Has another populated it ? */
                mm->nr_ptes++;
-               inc_zone_page_state(new, NR_PAGETABLE);
                pmd_populate(mm, pmd, new);
+               new = NULL;
        }
        spin_unlock(&mm->page_table_lock);
+       if (new)
+               pte_free(mm, new);
        return 0;
 }
 
@@ -334,11 +330,13 @@ int __pte_alloc_kernel(pmd_t *pmd, unsigned long address)
                return -ENOMEM;
 
        spin_lock(&init_mm.page_table_lock);
-       if (pmd_present(*pmd))          /* Another has populated it */
-               pte_free_kernel(&init_mm, new);
-       else
+       if (!pmd_present(*pmd)) {       /* Has another populated it ? */
                pmd_populate_kernel(&init_mm, pmd, new);
+               new = NULL;
+       }
        spin_unlock(&init_mm.page_table_lock);
+       if (new)
+               pte_free_kernel(&init_mm, new);
        return 0;
 }
 
@@ -1390,7 +1388,7 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 {
        pte_t *pte;
        int err;
-       struct page *pmd_page;
+       pgtable_t token;
        spinlock_t *uninitialized_var(ptl);
 
        pte = (mm == &init_mm) ?
@@ -1401,10 +1399,10 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 
        BUG_ON(pmd_huge(*pmd));
 
-       pmd_page = pmd_page(*pmd);
+       token = pmd_pgtable(*pmd);
 
        do {
-               err = fn(pte, pmd_page, addr, data);
+               err = fn(pte, token, addr, data);
                if (err)
                        break;
        } while (pte++, addr += PAGE_SIZE, addr != end);

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 0536dde139d1e1f6f28fc93ccd05a9fc337e2c7e..950c0be9ca8154d7b119019e50be5dc6838faa5b 100644 (file)
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -820,7 +820,7 @@ void  __attribute__((weak)) vmalloc_sync_all(void)
 }
 
 
-static int f(pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
+static int f(pte_t *pte, pgtable_t table, unsigned long addr, void *data)
 {
        /* apply_to_page_range() does all the hard work. */
        return 0;