file_inode(f)->i_mapping is f->f_mapping

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

mm/hugetlb.c

@@ -3287,7 +3287,7 @@ static void unmap_ref_private(struct mm_struct *mm, struct vm_area_struct *vma,
 	address = address & huge_page_mask(h);
 	pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) +
 			vma->vm_pgoff;
-	mapping = file_inode(vma->vm_file)->i_mapping;
+	mapping = vma->vm_file->f_mapping;
 
 	/*
 	 * Take the mapping lock for the duration of the table walk. As