by default, set_page_dirty() assumes the caller wants buffer heads, which
is not true for NFS files. trond determined this will suffice for now.
against 2.5.47.
diff -ruN 21-coalesce/fs/nfs/file.c 22-set_page_dirty/fs/nfs/file.c
--- 21-coalesce/fs/nfs/file.c Sun Nov 10 22:28:26 2002
+++ 22-set_page_dirty/fs/nfs/file.c Thu Nov 14 16:53:46 2002
@@ -168,6 +168,7 @@
struct address_space_operations nfs_file_aops = {
.readpage = nfs_readpage,
.readpages = nfs_readpages,
+ .set_page_dirty = __set_page_dirty_nobuffers,
.writepage = nfs_writepage,
.writepages = nfs_writepages,
.prepare_write = nfs_prepare_write,