KVM: x86_emulator: no writeback for bt

Signed-off-by: Qing He <qing.he@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 6161e3f66585..0afe660aec4b 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -1629,6 +1629,7 @@ twobyte_insn:
                 break;
         case 0xa3:
               bt:               /* bt */
+                c->dst.type = OP_NONE;
                 /* only subword offset */
                 c->src.val &= (c->dst.bytes << 3) - 1;
                 emulate_2op_SrcV_nobyte("bt", c->src, c->dst, ctxt->eflags);