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author | Paul Mackerras <paulus@samba.org> | 2007-05-08 03:37:51 (GMT) |
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committer | Paul Mackerras <paulus@samba.org> | 2007-05-08 03:37:51 (GMT) |
commit | 02bbc0f09c90cefdb2837605c96a66c5ce4ba2e1 (patch) | |
tree | 04ef573cd4de095c500c9fc3477f4278c0b36300 /include/linux/mm.h | |
parent | 7487a2245b8841c77ba9db406cf99a483b9334e9 (diff) | |
parent | 5b94f675f57e4ff16c8fda09088d7480a84dcd91 (diff) | |
download | linux-fsl-qoriq-02bbc0f09c90cefdb2837605c96a66c5ce4ba2e1.tar.xz |
Merge branch 'linux-2.6'
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r-- | include/linux/mm.h | 55 |
1 files changed, 50 insertions, 5 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 60e0e4a..4670ebd 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -267,21 +267,31 @@ static inline int get_page_unless_zero(struct page *page) return atomic_inc_not_zero(&page->_count); } +static inline struct page *compound_head(struct page *page) +{ + if (unlikely(PageTail(page))) + return page->first_page; + return page; +} + static inline int page_count(struct page *page) { - if (unlikely(PageCompound(page))) - page = (struct page *)page_private(page); - return atomic_read(&page->_count); + return atomic_read(&compound_head(page)->_count); } static inline void get_page(struct page *page) { - if (unlikely(PageCompound(page))) - page = (struct page *)page_private(page); + page = compound_head(page); VM_BUG_ON(atomic_read(&page->_count) == 0); atomic_inc(&page->_count); } +static inline struct page *virt_to_head_page(const void *x) +{ + struct page *page = virt_to_page(x); + return compound_head(page); +} + /* * Setup the page count before being freed into the page allocator for * the first time (boot or memory hotplug) @@ -314,6 +324,18 @@ static inline compound_page_dtor *get_compound_page_dtor(struct page *page) return (compound_page_dtor *)page[1].lru.next; } +static inline int compound_order(struct page *page) +{ + if (!PageHead(page)) + return 0; + return (unsigned long)page[1].lru.prev; +} + +static inline void set_compound_order(struct page *page, unsigned long order) +{ + page[1].lru.prev = (void *)order; +} + /* * Multiple processes may "see" the same page. E.g. for untouched * mappings of /dev/null, all processes see the same page full of @@ -850,8 +872,26 @@ static inline int vma_wants_writenotify(struct vm_area_struct *vma) extern pte_t *FASTCALL(get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl)); +#ifdef __PAGETABLE_PUD_FOLDED +static inline int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, + unsigned long address) +{ + return 0; +} +#else int __pud_alloc(struct mm_struct *mm, pgd_t *pgd, unsigned long address); +#endif + +#ifdef __PAGETABLE_PMD_FOLDED +static inline int __pmd_alloc(struct mm_struct *mm, pud_t *pud, + unsigned long address) +{ + return 0; +} +#else int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address); +#endif + int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address); int __pte_alloc_kernel(pmd_t *pmd, unsigned long address); @@ -1130,6 +1170,11 @@ 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, + void *data); +extern int apply_to_page_range(struct mm_struct *mm, unsigned long address, + unsigned long size, pte_fn_t fn, void *data); + #ifdef CONFIG_PROC_FS void vm_stat_account(struct mm_struct *, unsigned long, struct file *, long); #else |