#endif
ENTRY(_ret_from_fork)
+#ifdef CONFIG_IPIPE
+ /*
+ * Hw IRQs are off on entry, and we don't want the scheduling tail
+ * code to starve high priority domains from interrupts while it
+ * runs. Therefore we first stall the root stage to have the
+ * virtual interrupt state reflect IMASK.
+ */
+ p0.l = ___ipipe_root_status;
+ p0.h = ___ipipe_root_status;
+ r4 = [p0];
+ bitset(r4, 0);
+ [p0] = r4;
+ /*
+ * Then we may enable hw IRQs, allowing preemption from high
+ * priority domains. schedule_tail() will do local_irq_enable()
+ * since Blackfin does not define __ARCH_WANT_UNLOCKED_CTXSW, so
+ * there is no need to unstall the root domain by ourselves
+ * afterwards.
+ */
+ p0.l = _bfin_irq_flags;
+ p0.h = _bfin_irq_flags;
+ r4 = [p0];
+ sti r4;
+#endif /* CONFIG_IPIPE */
SP += -12;
call _schedule_tail;
SP += 12;