Re: [PATCH v1 1/2] ACPI, PCI: remove unused global list acpi_pci_roots in pci_root.c

[Rafael J. Wysocki]

On Wednesday, May 29, 2013 01:21:08 AM Rafael J. Wysocki wrote:
> On Tuesday, May 28, 2013 04:37:03 PM Bjorn Helgaas wrote:
> > On Tue, May 14, 2013 at 7:00 AM, Jiang Liu <liuj97@xxxxxxxxx> wrote:
> > > Now the global list acpi_pci_roots pci_root.c is useless, remove it.
> > >
> > > Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
> > > Cc: Len Brown <lenb@xxxxxxxxxx>
> > > Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
> > > Cc: linux-acpi@xxxxxxxxxxxxxxx
> > > Cc: linux-kernel@xxxxxxxxxxxxxxx
> > > ---
> > >  drivers/acpi/pci_root.c | 25 +++----------------------
> > >  include/acpi/acpi_bus.h |  1 -
> > >  2 files changed, 3 insertions(+), 23 deletions(-)
> > 
> > This and the "use acpi_handle_print()" patch look fine to me.
> > 
> > Rafael, I can take them, or if you want to take them yourself, you can add
> > 
> >   Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> 
> OK, I'll take them.

Well, if I do that, there will be conflicts between our trees, so I think it's
better if you handle them.

Please add

	Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

to both.

Thanks,
Rafael


> > > diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
> > > index b80e06e..91ddfd6 100644
> > > --- a/drivers/acpi/pci_root.c
> > > +++ b/drivers/acpi/pci_root.c
> > > @@ -65,10 +65,6 @@ static struct acpi_scan_handler pci_root_handler = {
> > >         .detach = acpi_pci_root_remove,
> > >  };
> > >
> > > -/* Lock to protect both acpi_pci_roots lists */
> > > -static DEFINE_MUTEX(acpi_pci_root_lock);
> > > -static LIST_HEAD(acpi_pci_roots);
> > > -
> > >  static DEFINE_MUTEX(osc_lock);
> > >
> > >  /**
> > > @@ -423,7 +419,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
> > >                 }
> > >         }
> > >
> > > -       INIT_LIST_HEAD(&root->node);
> > >         root->device = device;
> > >         root->segment = segment & 0xFFFF;
> > >         strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
> > > @@ -501,10 +496,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
> > >          * TBD: Need PCI interface for enumeration/configuration of roots.
> > >          */
> > >
> > > -       mutex_lock(&acpi_pci_root_lock);
> > > -       list_add_tail(&root->node, &acpi_pci_roots);
> > > -       mutex_unlock(&acpi_pci_root_lock);
> > > -
> > >         /*
> > >          * Scan the Root Bridge
> > >          * --------------------
> > > @@ -518,7 +509,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
> > >                             "Bus %04x:%02x not present in PCI namespace\n",
> > >                             root->segment, (unsigned int)root->secondary.start);
> > >                 result = -ENODEV;
> > > -               goto out_del_root;
> > > +               goto end;
> > >         }
> > >
> > >         /* ASPM setting */
> > > @@ -538,20 +529,13 @@ static int acpi_pci_root_add(struct acpi_device *device,
> > >         if (system_state != SYSTEM_BOOTING) {
> > >                 pcibios_resource_survey_bus(root->bus);
> > >                 pci_assign_unassigned_bus_resources(root->bus);
> > > -       }
> > > -
> > > -       /* need to after hot-added ioapic is registered */
> > > -       if (system_state != SYSTEM_BOOTING)
> > > +               /* need to after hot-added ioapic is registered */
> > >                 pci_enable_bridges(root->bus);
> > > +       }
> > >
> > >         pci_bus_add_devices(root->bus);
> > >         return 1;
> > >
> > > -out_del_root:
> > > -       mutex_lock(&acpi_pci_root_lock);
> > > -       list_del(&root->node);
> > > -       mutex_unlock(&acpi_pci_root_lock);
> > > -
> > >  end:
> > >         kfree(root);
> > >         return result;
> > > @@ -568,9 +552,6 @@ static void acpi_pci_root_remove(struct acpi_device *device)
> > >
> > >         pci_remove_root_bus(root->bus);
> > >
> > > -       mutex_lock(&acpi_pci_root_lock);
> > > -       list_del(&root->node);
> > > -       mutex_unlock(&acpi_pci_root_lock);
> > >         kfree(root);
> > >  }
> > >
> > > diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> > > index 22ba56e..4eb9a88 100644
> > > --- a/include/acpi/acpi_bus.h
> > > +++ b/include/acpi/acpi_bus.h
> > > @@ -447,7 +447,6 @@ int register_acpi_bus_type(struct acpi_bus_type *);
> > >  int unregister_acpi_bus_type(struct acpi_bus_type *);
> > >
> > >  struct acpi_pci_root {
> > > -       struct list_head node;
> > >         struct acpi_device * device;
> > >         struct pci_bus *bus;
> > >         u16 segment;
> > > --
> > > 1.8.1.2
> > >
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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