diff options
Diffstat (limited to 'arch/x86/kernel/ftrace.c')
| -rw-r--r-- | arch/x86/kernel/ftrace.c | 8 |
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) |