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Re: [libvirt] [Qemu-devel] [PATCH for-3.1] s390x: remove 's390-squash-mcss' option



On Thu, 2 Aug 2018 09:15:24 +0200
Cornelia Huck <cohuck redhat com> wrote:

> On Thu, 2 Aug 2018 09:34:37 +0800
> Fam Zheng <famz redhat com> wrote:
> 
> > On Wed, Aug 1, 2018 at 9:18 PM Cornelia Huck <cohuck redhat com> wrote:  
> > >
> > > On Wed, 1 Aug 2018 15:11:23 +0200
> > > Cornelia Huck <cohuck redhat com> wrote:
> > >    
> > > > On Wed, 1 Aug 2018 14:54:51 +0200
> > > > Cornelia Huck <cohuck redhat com> wrote:
> > > >    
> > > > > On Wed, 1 Aug 2018 18:21:27 +0800
> > > > > Fam Zheng <famz redhat com> wrote:
> > > > >    
> > > > > > On Tue, 07/24 11:24, Cornelia Huck wrote:    
> > > > > > > diff --git a/hw/s390x/css-bridge.c b/hw/s390x/css-bridge.c
> > > > > > > index a02d708239..1bd6c8b458 100644
> > > > > > > --- a/hw/s390x/css-bridge.c
> > > > > > > +++ b/hw/s390x/css-bridge.c
> > > > > > > @@ -106,7 +106,6 @@ VirtualCssBus *virtual_css_bus_init(void)
> > > > > > >      /* Create bus on bridge device */
> > > > > > >      bus = qbus_create(TYPE_VIRTUAL_CSS_BUS, dev, "virtual-css");
> > > > > > >      cbus = VIRTUAL_CSS_BUS(bus);    
> > > > > >
> > > > > > Not used now?
> > > > > >
> > > > > > Fam    
> > > > >
> > > > > Indeed, we can ditch the cbus variable.    
> > > >
> > > > ...or not :) We still need it for the return value, which is processed
> > > > in ccw_init(). We could change the return code of the function to
> > > > BusState, but I'm not sure it is worth the hassle.    
> > >
> > > ...but we can indeed get rid of the cbus and qbus variables in
> > > s390_ccw_realize().    
> > 
> > I got this from a patchew.org test (make docker-test-clang ubuntu):
> > 
> > /tmp/qemu-test/src/hw/s390x/3270-ccw.c:103:20: error: unused variable
> > 'cbus' [-Werror,-Wunused-variable]
> >     VirtualCssBus *cbus = VIRTUAL_CSS_BUS(qbus);
> >                    ^
> > 1 error generated.
> > /tmp/qemu-test/src/rules.mak:69: recipe for target 'hw/s390x/3270-ccw.o' failed  
> 
> Odd, why didn't I see that...
> 
> ...oh wait. Why do I have -disable-werror set? I'll send a patch.

On second thought, I'll just merge in the following:

diff --git a/hw/s390x/3270-ccw.c b/hw/s390x/3270-ccw.c
index cf58b81fc0..2c8d16ccf7 100644
--- a/hw/s390x/3270-ccw.c
+++ b/hw/s390x/3270-ccw.c
@@ -98,9 +98,6 @@ static void emulated_ccw_3270_realize(DeviceState *ds, Error **errp)
     EmulatedCcw3270Class *ck = EMULATED_CCW_3270_GET_CLASS(dev);
     CcwDevice *cdev = CCW_DEVICE(ds);
     CCWDeviceClass *cdk = CCW_DEVICE_GET_CLASS(cdev);
-    DeviceState *parent = DEVICE(cdev);
-    BusState *qbus = qdev_get_parent_bus(parent);
-    VirtualCssBus *cbus = VIRTUAL_CSS_BUS(qbus);
     SubchDev *sch;
     Error *err = NULL;
 
diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c
index d1280bf631..cad91ee626 100644
--- a/hw/s390x/s390-ccw.c
+++ b/hw/s390x/s390-ccw.c
@@ -67,8 +67,6 @@ static void s390_ccw_realize(S390CCWDevice *cdev, char *sysfsdev, Error **errp)
     CcwDevice *ccw_dev = CCW_DEVICE(cdev);
     CCWDeviceClass *ck = CCW_DEVICE_GET_CLASS(ccw_dev);
     DeviceState *parent = DEVICE(ccw_dev);
-    BusState *qbus = qdev_get_parent_bus(parent);
-    VirtualCssBus *cbus = VIRTUAL_CSS_BUS(qbus);
     SubchDev *sch;
     int ret;
     Error *err = NULL;


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