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);
10 int dax_clear_blocks(struct inode *, sector_t block, long size);
11 int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t);
12 int dax_truncate_page(struct inode *, loff_t from, get_block_t);
13 int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t,
14 dax_iodone_t);
15 int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t,
16 dax_iodone_t);
17 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
18 int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
19 unsigned int flags, get_block_t, dax_iodone_t);
20 int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
21 unsigned int flags, get_block_t, dax_iodone_t);
22 #else
dax_pmd_fault(struct vm_area_struct * vma,unsigned long addr,pmd_t * pmd,unsigned int flags,get_block_t gb,dax_iodone_t di)23 static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
24 pmd_t *pmd, unsigned int flags, get_block_t gb,
25 dax_iodone_t di)
26 {
27 return VM_FAULT_FALLBACK;
28 }
29 #define __dax_pmd_fault dax_pmd_fault
30 #endif
31 int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *);
32 #define dax_mkwrite(vma, vmf, gb, iod) dax_fault(vma, vmf, gb, iod)
33 #define __dax_mkwrite(vma, vmf, gb, iod) __dax_fault(vma, vmf, gb, iod)
34
vma_is_dax(struct vm_area_struct * vma)35 static inline bool vma_is_dax(struct vm_area_struct *vma)
36 {
37 return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
38 }
39 #endif
40