--- 2.4.19pre9aa1/arch/um/kernel/init_task.c.~1~	Wed May 29 20:26:49 2002
+++ 2.4.19pre9aa1/arch/um/kernel/init_task.c	Wed May 29 22:20:00 2002
@@ -6,6 +6,7 @@
 #include "linux/mm.h"
 #include "linux/sched.h"
 #include "linux/version.h"
+#include "linux/sched_runqueue.h"
 #include "asm/uaccess.h"
 #include "asm/pgtable.h"
 #include "user_util.h"
--- 2.4.19pre9aa1/arch/um/kernel/process_kern.c.~1~	Wed May 29 20:26:49 2002
+++ 2.4.19pre9aa1/arch/um/kernel/process_kern.c	Wed May 29 22:27:09 2002
@@ -119,7 +119,7 @@ unsigned long alloc_stack(void)
 	return(page);
 }
 
-extern void schedule_tail(struct task_struct *prev);
+asmlinkage void schedule_tail(task_t *prev);
 
 static void new_thread_handler(int sig)
 {
@@ -134,8 +134,10 @@ static void new_thread_handler(int sig)
 	free_page(current->thread.temp_stack);
 	set_cmdline("(kernel thread)");
 	force_flush_all();
+#ifdef CONFIG_SMP
 	if(current->thread.prev_sched != NULL)
 		schedule_tail(current->thread.prev_sched);
+#endif
 	current->thread.prev_sched = NULL;
 	change_sig(SIGUSR1, 1);
 	unblock_signals();
@@ -247,8 +249,10 @@ void finish_fork_handler(int sig)
 	if(current->mm != current->p_pptr->mm)
 		protect(uml_reserved, high_physmem - uml_reserved, 1, 1, 0, 1);
 	task_protections((unsigned long) current);
+#ifdef CONFIG_SMP
 	if(current->thread.prev_sched != NULL)
 		schedule_tail(current->thread.prev_sched);
+#endif
 	current->thread.prev_sched = NULL;
 
 	free_page(current->thread.temp_stack);