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

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d26162e..b322c85 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3287,7 +3287,7 @@
 	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