Hook up LITMUS^RT remote preemption support on ARM

Call into scheduler state machine in the IPI handler.

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 40dc74f2b27f..b72fbf3d043c 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -38,6 +38,8 @@
 #include <asm/localtimer.h>
 #include <asm/smp_plat.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
@@ -533,6 +535,8 @@ asmlinkage void __exception do_IPI(struct pt_regs *regs)
                                  * nothing more to do - eveything is
                                  * done on the interrupt return path
                                  */
+                                /* LITMUS^RT: take action based on scheduler state */
+                                sched_state_ipi();
                                 break;
 
                         case IPI_CALL_FUNC: