Index: /trunk/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c
===================================================================
--- /trunk/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c	(revision 19906)
+++ /trunk/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c	(revision 19907)
@@ -54,2 +54,13 @@
 }
 
+
+RTDECL(bool) RTThreadPreemptIsPending(RTTHREAD hThread)
+{
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 4)
+    return test_tsk_thread_flag(current, TIF_NEED_RESCHED);
+#else
+    /** @todo get back to this if it matters. */
+    return false;
+#endif
+}
+