diff options
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 53 |
1 files changed, 39 insertions, 14 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index ece042dfe23c..192c1bbe5fcd 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -309,10 +309,34 @@ struct vm_fault { * VM_FAULT_DAX_LOCKED and fill in * entry here. */ - /* for ->map_pages() only */ - pgoff_t max_pgoff; /* map pages for offset from pgoff till - * max_pgoff inclusive */ - pte_t *pte; /* pte entry associated with ->pgoff */ +}; + +/* + * Page fault context: passes though page fault handler instead of endless list + * of function arguments. + */ +struct fault_env { + struct vm_area_struct *vma; /* Target VMA */ + unsigned long address; /* Faulting virtual address */ + unsigned int flags; /* FAULT_FLAG_xxx flags */ + pmd_t *pmd; /* Pointer to pmd entry matching + * the 'address' + */ + pte_t *pte; /* Pointer to pte entry matching + * the 'address'. NULL if the page + * table hasn't been allocated. + */ + spinlock_t *ptl; /* Page table lock. + * Protects pte page table if 'pte' + * is not NULL, otherwise pmd. + */ + pgtable_t prealloc_pte; /* Pre-allocated pte page table. + * vm_ops->map_pages() calls + * alloc_set_pte() from atomic context. + * do_fault_around() pre-allocates + * page table to avoid allocation from + * atomic context. + */ }; /* @@ -327,7 +351,8 @@ struct vm_operations_struct { int (*fault)(struct vm_area_struct *vma, struct vm_fault *vmf); int (*pmd_fault)(struct vm_area_struct *, unsigned long address, pmd_t *, unsigned int flags); - void (*map_pages)(struct vm_area_struct *vma, struct vm_fault *vmf); + void (*map_pages)(struct fault_env *fe, + pgoff_t start_pgoff, pgoff_t end_pgoff); /* notification that a previously read-only page is about to become * writable, if an error is returned it will cause a SIGBUS */ @@ -537,7 +562,6 @@ void __put_page(struct page *page); void put_pages_list(struct list_head *pages); void split_page(struct page *page, unsigned int order); -int split_free_page(struct page *page); /* * Compound pages have a destructor function. Provide a @@ -601,8 +625,8 @@ static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma) return pte; } -void do_set_pte(struct vm_area_struct *vma, unsigned long address, - struct page *page, pte_t *pte, bool write, bool anon); +int alloc_set_pte(struct fault_env *fe, struct mem_cgroup *memcg, + struct page *page); #endif /* @@ -1035,6 +1059,7 @@ static inline pgoff_t page_file_index(struct page *page) } bool page_mapped(struct page *page); +struct address_space *page_mapping(struct page *page); /* * Return true only if the page has been allocated with @@ -1215,15 +1240,14 @@ int generic_error_remove_page(struct address_space *mapping, struct page *page); int invalidate_inode_page(struct page *page); #ifdef CONFIG_MMU -extern int handle_mm_fault(struct mm_struct *mm, struct vm_area_struct *vma, - unsigned long address, unsigned int flags); +extern int handle_mm_fault(struct vm_area_struct *vma, unsigned long address, + unsigned int flags); extern int fixup_user_fault(struct task_struct *tsk, struct mm_struct *mm, unsigned long address, unsigned int fault_flags, bool *unlocked); #else -static inline int handle_mm_fault(struct mm_struct *mm, - struct vm_area_struct *vma, unsigned long address, - unsigned int flags) +static inline int handle_mm_fault(struct vm_area_struct *vma, + unsigned long address, unsigned int flags) { /* should never happen if there's no MMU */ BUG(); @@ -2063,7 +2087,8 @@ extern void truncate_inode_pages_final(struct address_space *); /* generic vm_area_ops exported for stackable file systems */ extern int filemap_fault(struct vm_area_struct *, struct vm_fault *); -extern void filemap_map_pages(struct vm_area_struct *vma, struct vm_fault *vmf); +extern void filemap_map_pages(struct fault_env *fe, + pgoff_t start_pgoff, pgoff_t end_pgoff); extern int filemap_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); /* mm/page-writeback.c */ |