KVM: Future-proof the exit information union ABI

Note that as the size of struct kvm_run is not part of the ABI, we can add
things at the end.

Signed-off-by: Avi Kivity <avi@qumranet.com>

diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index e6edca8..b9a4b7c 100644 (file)
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -111,6 +111,8 @@ struct kvm_run {
                        __u32 longmode;
                        __u32 pad;
                } hypercall;
+               /* Fix the size of the union. */
+               char padding[256];
        };
 };