PR6972. Fixed vfs tapset.

PR6972.  Fixed vfs tapset.

2008-10-28  David Smith  <dsmith@redhat.com>

	PR6972
	* vfs.stp (generic.fop.aio_read): Works under 2.6.18 kernels, such
	as RHEL5.
	(generic.fop.aio_read.return): Ditto.
	(vfs.__set_page_dirty_buffers): Fixed small bug.
	(_vfs.block_write_begin): Only use for kernels >= 2.6.24.
	(_vfs.block_write_begin.return): Ditto.
	(_vfs.block_write_end): Ditto.
	(_vfs.block_write_end.return): Ditto.

2008-10-28  David Smith  <dsmith@redhat.com>

	* buildok/vfs_testcase.stp: Fixes for updated vfs tapset.