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Commit | Line | Data |
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c94c2acf MW |
1 | #ifndef _LINUX_DAX_H |
2 | #define _LINUX_DAX_H | |
3 | ||
4 | #include <linux/fs.h> | |
5 | #include <linux/mm.h> | |
6 | #include <asm/pgtable.h> | |
7 | ||
8 | ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t, | |
9 | get_block_t, dio_iodone_t, int flags); | |
c94c2acf MW |
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); | |
02fbd139 JK |
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); | |
d1a5f2b4 DW |
14 | |
15 | #ifdef CONFIG_FS_DAX | |
16 | struct page *read_dax_sector(struct block_device *bdev, sector_t n); | |
17 | #else | |
18 | static inline struct page *read_dax_sector(struct block_device *bdev, | |
19 | sector_t n) | |
20 | { | |
21 | return ERR_PTR(-ENXIO); | |
22 | } | |
23 | #endif | |
24 | ||
844f35db MW |
25 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
26 | int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, | |
02fbd139 | 27 | unsigned int flags, get_block_t); |
844f35db | 28 | int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
02fbd139 | 29 | unsigned int flags, get_block_t); |
844f35db MW |
30 | #else |
31 | static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, | |
02fbd139 | 32 | pmd_t *pmd, unsigned int flags, get_block_t gb) |
844f35db MW |
33 | { |
34 | return VM_FAULT_FALLBACK; | |
35 | } | |
36 | #define __dax_pmd_fault dax_pmd_fault | |
37 | #endif | |
c94c2acf | 38 | int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *); |
02fbd139 JK |
39 | #define dax_mkwrite(vma, vmf, gb) dax_fault(vma, vmf, gb) |
40 | #define __dax_mkwrite(vma, vmf, gb) __dax_fault(vma, vmf, gb) | |
c94c2acf | 41 | |
4897c765 MW |
42 | static inline bool vma_is_dax(struct vm_area_struct *vma) |
43 | { | |
44 | return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); | |
45 | } | |
f9fe48be RZ |
46 | |
47 | static inline bool dax_mapping(struct address_space *mapping) | |
48 | { | |
49 | return mapping->host && IS_DAX(mapping->host); | |
50 | } | |
7f6d5b52 RZ |
51 | |
52 | struct writeback_control; | |
53 | int dax_writeback_mapping_range(struct address_space *mapping, | |
54 | struct block_device *bdev, struct writeback_control *wbc); | |
c94c2acf | 55 | #endif |