Remove the useless argument, and do not do anything if there are no VMs running at the time of the hotplug.
Cc: sta...@vger.kernel.org Cc: kvm@vger.kernel.org Cc: g...@redhat.com Cc: jan.kis...@siemens.com Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- virt/kvm/kvm_main.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 979bff4..75522b3 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2681,10 +2681,11 @@ static void hardware_enable_nolock(void *junk) } } -static void hardware_enable(void *junk) +static void hardware_enable(void) { raw_spin_lock(&kvm_lock); - hardware_enable_nolock(junk); + if (kvm_usage_count) + hardware_enable_nolock(NULL); raw_spin_unlock(&kvm_lock); } @@ -2698,10 +2699,11 @@ static void hardware_disable_nolock(void *junk) kvm_arch_hardware_disable(NULL); } -static void hardware_disable(void *junk) +static void hardware_disable(void) { raw_spin_lock(&kvm_lock); - hardware_disable_nolock(junk); + if (kvm_usage_count) + hardware_disable_nolock(NULL); raw_spin_unlock(&kvm_lock); } @@ -2756,12 +2758,12 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, case CPU_DYING: printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", cpu); - hardware_disable(NULL); + hardware_disable(); break; case CPU_STARTING: printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", cpu); - hardware_enable(NULL); + hardware_enable(); break; } return NOTIFY_OK; -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html