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 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 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