Index: bora-vmsoft/hgfs/linux/page.c
===================================================================
--- bora-vmsoft.orig/hgfs/linux/page.c
+++ bora-vmsoft/hgfs/linux/page.c
@@ -744,10 +744,16 @@ HgfsDoWriteBegin(struct page *page,     
                  unsigned pageFrom,         // IN: Starting page offset
                  unsigned pageTo)           // IN: Ending page offset
 {
+#ifndef HGFS_ENABLE_WRITEBACK
+   ASSERT(page);
+#else
+   loff_t offset;
+   loff_t currentFileSize;
+
    ASSERT(page);
-#ifdef HGFS_ENABLE_WRITEBACK
-   loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
-   loff_t currentFileSize = compat_i_size_read(page->mapping->host);
+
+   offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
+   currentFileSize = compat_i_size_read(page->mapping->host);
 
    /*
     * If we are doing a partial write into a new page (beyond end of
@@ -850,7 +856,15 @@ HgfsWriteBegin(struct file *file,       
    unsigned pageTo = pos + len;
    struct page *page;
 
+/*
+ * AOP_FLAG_NOFS was defined in the same changeset that
+ * grab_cache_page_write_begin() was introduced.
+ */
+#ifdef AOP_FLAG_NOFS
+   page = grab_cache_page_write_begin(mapping, index, flags);
+#else
    page = __grab_cache_page(mapping, index);
+#endif
    if (page == NULL) {
       return -ENOMEM;
    }