1 files changed, 4 insertions, 3 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 8865538b26b6..31fdb03225cd 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -554,13 +554,14 @@ void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
 static inline
 unsigned int nfs_page_length(struct page *page)
 {
-        loff_t i_size = i_size_read(page->mapping->host);
+        loff_t i_size = i_size_read(page_file_mapping(page)->host);
 
         if (i_size > 0) {
+                pgoff_t page_index = page_file_index(page);
                 pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
-                if (page->index < end_index)
+                if (page_index < end_index)
                         return PAGE_CACHE_SIZE;
-                if (page->index == end_index)
+                if (page_index == end_index)
                         return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
         }
         return 0;