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-rw-r--r--arch/x86/kernel/ftrace.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 5b7153540727..8ee76dce9140 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -533,7 +533,13 @@ static void do_sync_core(void *data)
static void run_sync(void)
{
- int enable_irqs = irqs_disabled();
+ int enable_irqs;
+
+ /* No need to sync if there's only one CPU */
+ if (num_online_cpus() == 1)
+ return;
+
+ enable_irqs = irqs_disabled();
/* We may be called with interrupts disabled (on bootup). */
if (enable_irqs)