Heiko Carstens wrote:
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 747966e..376538c 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -2416,6 +2416,12 @@ static long kvm_dev_ioctl(struct file *filp, r = 0; break; } + case KVM_CHECK_EXTENSION: + /* + * No extensions defined at present. + */ + r = 0; + break; default:What exactly is this good for?
Extending the interface in a backwards compatible manner. When new interfaces are added, it will return 1 (depending on arg) for implemented extensions.
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