1 files changed, 7 insertions, 29 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 7b9cd49622b1..39b3a174a425 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1730,43 +1730,25 @@ static int blkdev_dax_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
         return __dax_fault(vma, vmf, blkdev_get_block, NULL);
 }
 
-static int blkdev_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
-                pmd_t *pmd, unsigned int flags)
-{
-        return __dax_pmd_fault(vma, addr, pmd, flags, blkdev_get_block, NULL);
-}
-
-static void blkdev_vm_open(struct vm_area_struct *vma)
+static int blkdev_dax_pfn_mkwrite(struct vm_area_struct *vma,
+                struct vm_fault *vmf)
 {
-        struct inode *bd_inode = bdev_file_inode(vma->vm_file);
-        struct block_device *bdev = I_BDEV(bd_inode);
-
-        inode_lock(bd_inode);
-        bdev->bd_map_count++;
-        inode_unlock(bd_inode);
+        return dax_pfn_mkwrite(vma, vmf);
 }
 
-static void blkdev_vm_close(struct vm_area_struct *vma)
+static int blkdev_dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
+                pmd_t *pmd, unsigned int flags)
 {
-        struct inode *bd_inode = bdev_file_inode(vma->vm_file);
-        struct block_device *bdev = I_BDEV(bd_inode);
-
-        inode_lock(bd_inode);
-        bdev->bd_map_count--;
-        inode_unlock(bd_inode);
+        return __dax_pmd_fault(vma, addr, pmd, flags, blkdev_get_block, NULL);
 }
 
 static const struct vm_operations_struct blkdev_dax_vm_ops = {
-        .open           = blkdev_vm_open,
-        .close          = blkdev_vm_close,
         .fault          = blkdev_dax_fault,
         .pmd_fault      = blkdev_dax_pmd_fault,
-        .pfn_mkwrite    = blkdev_dax_fault,
+        .pfn_mkwrite    = blkdev_dax_pfn_mkwrite,
 };
 
 static const struct vm_operations_struct blkdev_default_vm_ops = {
-        .open           = blkdev_vm_open,
-        .close          = blkdev_vm_close,
         .fault          = filemap_fault,
         .map_pages      = filemap_map_pages,
 };
@@ -1774,18 +1756,14 @@ static const struct vm_operations_struct blkdev_default_vm_ops = {
 static int blkdev_mmap(struct file *file, struct vm_area_struct *vma)
 {
         struct inode *bd_inode = bdev_file_inode(file);
-        struct block_device *bdev = I_BDEV(bd_inode);
 
         file_accessed(file);
-        inode_lock(bd_inode);
-        bdev->bd_map_count++;
         if (IS_DAX(bd_inode)) {
                 vma->vm_ops = &blkdev_dax_vm_ops;
                 vma->vm_flags |= VM_MIXEDMAP | VM_HUGEPAGE;
         } else {
                 vma->vm_ops = &blkdev_default_vm_ops;
         }
-        inode_unlock(bd_inode);
 
         return 0;
 }