commit 71ba994c94a81c37185ef2fb5190844286ba9aca
author Paolo Bonzini <pbonzini@redhat.com> Wed Jul 29 12:31:15 2015 +0200
committer Paolo Bonzini <pbonzini@redhat.com> Thu Jul 30 16:02:56 2015 +0200
tree 3eff9ec87d264f8e04fcbeffe3e8f5805f0688c3
parent dd489240a21afc3ff3962aba5d987229536cae63

KVM: x86: clean/fix memory barriers in irqchip_in_kernel

The memory barriers are trying to protect against concurrent RCU-based
interrupt injection, but the IRQ routing table is not valid at the time
kvm->arch.vpic is written.  Fix this by writing kvm->arch.vpic last.
kvm_destroy_pic then need not set kvm->arch.vpic to NULL; modify it
to take a struct kvm_pic* and reuse it if the IOAPIC creation fails.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>