6 #include <asm/pgtable.h>
8 ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t,
9 get_block_t, dio_iodone_t, int flags);
10 int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t);
11 int dax_truncate_page(struct inode *, loff_t from, get_block_t);
12 int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t);
13 int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t);
16 struct page *read_dax_sector(struct block_device *bdev, sector_t n);
17 int __dax_zero_page_range(struct block_device *bdev, sector_t sector,
18 unsigned int offset, unsigned int length);
20 static inline struct page *read_dax_sector(struct block_device *bdev,
23 return ERR_PTR(-ENXIO);
25 static inline int __dax_zero_page_range(struct block_device *bdev,
26 sector_t sector, unsigned int offset, unsigned int length)
32 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
33 int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
34 unsigned int flags, get_block_t);
35 int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
36 unsigned int flags, get_block_t);
38 static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
39 pmd_t *pmd, unsigned int flags, get_block_t gb)
41 return VM_FAULT_FALLBACK;
43 #define __dax_pmd_fault dax_pmd_fault
45 int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *);
46 #define dax_mkwrite(vma, vmf, gb) dax_fault(vma, vmf, gb)
47 #define __dax_mkwrite(vma, vmf, gb) __dax_fault(vma, vmf, gb)
49 static inline bool vma_is_dax(struct vm_area_struct *vma)
51 return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
54 static inline bool dax_mapping(struct address_space *mapping)
56 return mapping->host && IS_DAX(mapping->host);
59 struct writeback_control;
60 int dax_writeback_mapping_range(struct address_space *mapping,
61 struct block_device *bdev, struct writeback_control *wbc);