diff -r e15391c2e6f1 tools/blktap2/drivers/tapdisk-queue.c
--- a/tools/blktap2/drivers/tapdisk-queue.c	Thu Feb 04 12:13:30 2010 +0100
+++ b/tools/blktap2/drivers/tapdisk-queue.c	Thu Feb 04 12:38:09 2010 +0100
@@ -284,11 +284,14 @@ struct lio {
 
 #define LIO_FLAG_EVENTFD        (1<<0)
 
+#if defined(__linux__)
+/* XXX abstraction violation: move this into a linux specific file */
 static int
 tapdisk_lio_check_resfd(void)
 {
 	return tapdisk_linux_version() >= KERNEL_VERSION(2, 6, 22);
 }
+#endif
 
 static void
 tapdisk_lio_destroy_aio(struct tqueue *queue)
@@ -372,8 +375,11 @@ tapdisk_lio_setup_aio(struct tqueue *que
 	 * if not, fall back to the poll fd patch.
 	 */
 
+#if defined(__linux__)
+/* XXX abstraction violation: move this into a linux specific file */
 	err = !tapdisk_lio_check_resfd();
 	if (!err)
+#endif
 		err = __lio_setup_aio_eventfd(queue, qlen);
 	if (err)
 		err = __lio_setup_aio_poll(queue, qlen);