diff options
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 73 |
1 files changed, 14 insertions, 59 deletions
@@ -819,16 +819,16 @@ static int dax_insert_mapping(struct address_space *mapping, } /** - * __dax_fault - handle a page fault on a DAX file + * dax_fault - handle a page fault on a DAX file * @vma: The virtual memory area where the fault occurred * @vmf: The description of the fault * @get_block: The filesystem method used to translate file offsets to blocks * * When a page fault occurs, filesystems may call this helper in their - * fault handler for DAX files. __dax_fault() assumes the caller has done all + * fault handler for DAX files. dax_fault() assumes the caller has done all * the necessary locking for the page fault to proceed successfully. */ -int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf, +int dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf, get_block_t get_block) { struct file *file = vma->vm_file; @@ -913,33 +913,6 @@ int __dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf, return VM_FAULT_SIGBUS | major; return VM_FAULT_NOPAGE | major; } -EXPORT_SYMBOL(__dax_fault); - -/** - * dax_fault - handle a page fault on a DAX file - * @vma: The virtual memory area where the fault occurred - * @vmf: The description of the fault - * @get_block: The filesystem method used to translate file offsets to blocks - * - * When a page fault occurs, filesystems may call this helper in their - * fault handler for DAX files. - */ -int dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf, - get_block_t get_block) -{ - int result; - struct super_block *sb = file_inode(vma->vm_file)->i_sb; - - if (vmf->flags & FAULT_FLAG_WRITE) { - sb_start_pagefault(sb); - file_update_time(vma->vm_file); - } - result = __dax_fault(vma, vmf, get_block); - if (vmf->flags & FAULT_FLAG_WRITE) - sb_end_pagefault(sb); - - return result; -} EXPORT_SYMBOL_GPL(dax_fault); #if defined(CONFIG_TRANSPARENT_HUGEPAGE) @@ -967,7 +940,16 @@ static void __dax_dbg(struct buffer_head *bh, unsigned long address, #define dax_pmd_dbg(bh, address, reason) __dax_dbg(bh, address, reason, "dax_pmd") -int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address, +/** + * dax_pmd_fault - handle a PMD fault on a DAX file + * @vma: The virtual memory area where the fault occurred + * @vmf: The description of the fault + * @get_block: The filesystem method used to translate file offsets to blocks + * + * When a page fault occurs, filesystems may call this helper in their + * pmd_fault handler for DAX files. + */ +int dax_pmd_fault(struct vm_area_struct *vma, unsigned long address, pmd_t *pmd, unsigned int flags, get_block_t get_block) { struct file *file = vma->vm_file; @@ -1119,7 +1101,7 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address, * * The PMD path doesn't have an equivalent to * dax_pfn_mkwrite(), though, so for a read followed by a - * write we traverse all the way through __dax_pmd_fault() + * write we traverse all the way through dax_pmd_fault() * twice. This means we can just skip inserting a radix tree * entry completely on the initial read and just wait until * the write to insert a dirty entry. @@ -1148,33 +1130,6 @@ int __dax_pmd_fault(struct vm_area_struct *vma, unsigned long address, result = VM_FAULT_FALLBACK; goto out; } -EXPORT_SYMBOL_GPL(__dax_pmd_fault); - -/** - * dax_pmd_fault - handle a PMD fault on a DAX file - * @vma: The virtual memory area where the fault occurred - * @vmf: The description of the fault - * @get_block: The filesystem method used to translate file offsets to blocks - * - * When a page fault occurs, filesystems may call this helper in their - * pmd_fault handler for DAX files. - */ -int dax_pmd_fault(struct vm_area_struct *vma, unsigned long address, - pmd_t *pmd, unsigned int flags, get_block_t get_block) -{ - int result; - struct super_block *sb = file_inode(vma->vm_file)->i_sb; - - if (flags & FAULT_FLAG_WRITE) { - sb_start_pagefault(sb); - file_update_time(vma->vm_file); - } - result = __dax_pmd_fault(vma, address, pmd, flags, get_block); - if (flags & FAULT_FLAG_WRITE) - sb_end_pagefault(sb); - - return result; -} EXPORT_SYMBOL_GPL(dax_pmd_fault); #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |