1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index f6db48c405b8..28f5fb495a66 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -172,6 +172,9 @@ void smp_reschedule_interrupt(struct pt_regs *regs)
 {
         ack_APIC_irq();
         inc_irq_stat(irq_resched_count);
+        /*
+         * KVM uses this interrupt to force a cpu out of guest mode
+         */
 }
 
 void smp_call_function_interrupt(struct pt_regs *regs)