From: Borislav Petkov <[email protected]> When hpet=force is supplied on the kernel command line and the HPET supports the Legacy Replacement Interrupt Route option (HPET_ID_LEGSUP), the legacy interrupts init code uses the boot CPU's mask initially by calling smp_processor_id() assuming that it is running on the BSP.
And it does run on the BSP but the code region is preemptible and the preemption check fires. Simply use the BSP's id directly to avoid the warning. Signed-off-by: Borislav Petkov <[email protected]> --- arch/x86/kernel/hpet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index 89ff7af2de50..16f82a3aaec7 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -285,7 +285,7 @@ static void hpet_legacy_clockevent_register(void) * Start hpet with the boot cpu mask and make it * global after the IO_APIC has been initialized. */ - hpet_clockevent.cpumask = cpumask_of(smp_processor_id()); + hpet_clockevent.cpumask = cpumask_of(boot_cpu_data.cpu_index); clockevents_config_and_register(&hpet_clockevent, hpet_freq, HPET_MIN_PROG_DELTA, 0x7FFFFFFF); global_clock_event = &hpet_clockevent; -- 2.13.0
