Hello, I had to apply to following trivial patch to my kvm git checkout to build the external module on 2.6.27.
diff --git a/kernel/external-module-compat-comm.h b/kernel/external-module-compat-comm.h index 981dc96..9156a0c 100644 --- a/kernel/external-module-compat-comm.h +++ b/kernel/external-module-compat-comm.h @@ -613,7 +613,7 @@ static inline void kvm_hrtimer_start_expires(struct hrtimer *timer, int mode) #endif -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) +#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28) static inline ktime_t kvm_hrtimer_expires_remaining(const struct hrtimer *timer) {