Index: uspace/app/trace/syscalls.c
===================================================================
--- uspace/app/trace/syscalls.c	(revision 7431b66531a16a53dda757d3e07d0ac028368f72)
+++ uspace/app/trace/syscalls.c	(revision 2fa10f640409c06070df4329491173719b3e824c)
@@ -73,5 +73,4 @@
     [SYS_PHYSMEM_MAP] = { "physmem_map",		4,	V_ERRNO },
     [SYS_IOSPACE_ENABLE] = { "iospace_enable",		1,	V_ERRNO },
-    [SYS_PREEMPT_CONTROL] = { "preempt_control",	1,	V_ERRNO },
 
     [SYS_SYSINFO_GET_TAG] = { "sysinfo_get_tag",		2,	V_INTEGER },
Index: uspace/lib/c/generic/ddi.c
===================================================================
--- uspace/lib/c/generic/ddi.c	(revision 7431b66531a16a53dda757d3e07d0ac028368f72)
+++ uspace/lib/c/generic/ddi.c	(revision 2fa10f640409c06070df4329491173719b3e824c)
@@ -96,13 +96,4 @@
 }
 
-/** Interrupt control
- *
- * @param enable	1 - enable interrupts, 0 - disable interrupts
- */
-int preemption_control(int enable)
-{
-	return __SYSCALL1(SYS_PREEMPT_CONTROL, (sysarg_t) enable);
-}
-
 /** Enable PIO for specified I/O range.
  *
Index: uspace/lib/c/include/ddi.h
===================================================================
--- uspace/lib/c/include/ddi.h	(revision 7431b66531a16a53dda757d3e07d0ac028368f72)
+++ uspace/lib/c/include/ddi.h	(revision 2fa10f640409c06070df4329491173719b3e824c)
@@ -41,5 +41,4 @@
 extern int physmem_map(void *, void *, unsigned long, int);
 extern int iospace_enable(task_id_t, void *, unsigned long);
-extern int preemption_control(int);
 extern int pio_enable(void *, size_t, void **);