Integrate preemption state machine with Linux scheduler

Track when a processor is going to schedule "soon".

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 5919eb451bb9..1a945e27d310 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -46,6 +46,8 @@
 #include <asm/virt.h>
 #include <asm/mach/arch.h>
 
+#include <litmus/preempt.h>
+
 /*
  * as from 2.5, kernels no longer have an init_tasks structure
  * so we need some other way of telling a new secondary core
@@ -617,6 +619,8 @@ void handle_IPI(int ipinr, struct pt_regs *regs)
 #endif
 
         case IPI_RESCHEDULE:
+                /* LITMUS^RT: take action based on scheduler state */
+                sched_state_ipi();
                 scheduler_ipi();
                 break;