[PATCH] sched: arch preempt notifier mechanism
This adds a general mechanism whereby a task can request the scheduler to
notify it whenever it is preempted or scheduled back in. This allows the
task to swap any special-purpose registers like the fpu or Intel's VT
registers.
Signed-off-by: Avi Kivity <avi@qumranet.com>
[ mingo@elte.hu: fixes, cleanups ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt
index c64ce9c..6b06663 100644
--- a/kernel/Kconfig.preempt
+++ b/kernel/Kconfig.preempt
@@ -63,3 +63,6 @@
Say Y here if you are building a kernel for a desktop system.
Say N if you are unsure.
+config PREEMPT_NOTIFIERS
+ bool
+