Hook up LITMUS^RT remote preemption support on x86

Call into scheduler state machine in the IPI handler.

1 files changed, 4 insertions, 5 deletions

diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 97af589a5c0c..74cca6014c0e 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -23,7 +23,8 @@
 #include <linux/cpu.h>
 #include <linux/gfp.h>
 
-#include <litmus/litmus.h>
+#include <litmus/preempt.h>
+#include <litmus/debug_trace.h>
 #include <litmus/trace.h>
 
 #include <asm/mtrr.h>
@@ -212,10 +213,8 @@ static void native_smp_send_stop(void)
 void smp_reschedule_interrupt(struct pt_regs *regs)
 {
         ack_APIC_irq();
-        /* LITMUS^RT needs this interrupt to proper reschedule
-         * on this cpu
-         */
-        set_tsk_need_resched(current);
+        /* LITMUS^RT: this IPI might need to trigger the sched state machine. */
+        sched_state_ipi();
         inc_irq_stat(irq_resched_count);
         TS_SEND_RESCHED_END;
         /*