Re: kvm-kmod and kernels 3.11.*

[Paolo Bonzini <pbonzini@redhat.com>]

Il 13/12/2013 17:19, Gabriel L. Somlo ha scritto:
> So I tried to mimic the existing "sed" functionality of the "sync"
> script, and was was left deciding between excising the call to         smp_mb__after_srcu_read_unlock() from line 6009 of x86.c (since it's
> defined as a no-op in the header), or sed-ing in the declaration from
> the kvm srcu.h via the sync script. I think the latter is slightly less
> cheesy, but I'm really curious what you think would have been the
> "canonical" way to do this :)

You can also do this:

diff --git a/external-module-compat-comm.h b/external-module-compat-comm.h
index 34fb320..5fa075e 100644
--- a/external-module-compat-comm.h
+++ b/external-module-compat-comm.h
@@ -1408,3 +1408,7 @@ static inline void guest_exit(void)
 }
 #endif /* !CONFIG_CONTEXT_TRACKING */
 #endif /* < 3.10 */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,13,0)
+#define smp_mb__after_srcu_read_unlock() smp_mb()
+#endif

Paolo