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SubjectRe: [PATCH v6 30/30] PCI: Remove pci_bus_assign_domain_nr()
On Mon, Mar 09, 2015 at 10:34:27AM +0800, Yijing Wang wrote:
> Now we save the domain number in pci_host_bridge,
> we could remove pci_bus_assign_domain_nr() and
> clean the domain member in pci_bus.
>
> Signed-off-by: Yijing Wang <wangyijing@huawei.com>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
> ---
> drivers/pci/pci.c | 5 -----
> drivers/pci/probe.c | 12 ++++--------
> include/linux/pci.h | 3 ---
> 3 files changed, 4 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> index 2cf942b..4d8dfe4 100644
> --- a/drivers/pci/pci.c
> +++ b/drivers/pci/pci.c
> @@ -4581,11 +4581,6 @@ void pci_host_assign_domain_nr(struct pci_host_bridge *host)
> {
> host->domain = pci_assign_domain_nr(host->dev.parent);
> }
> -
> -void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent)
> -{
> - bus->domain_nr = pci_assign_domain_nr(parent);
> -}

I think you forgot to remove the empty pci_bus_assign_domain_nr()
definition from include/linux/pci.h.

I'm not sure how much value is left in CONFIG_PCI_DOMAINS_GENERIC. You're
removed *almost* everything that uses it. I wonder how hard it would be to
get rid of that last little bit.

> #endif
> #endif
>
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 196f08a..9cd3ca2 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -481,7 +481,7 @@ void pci_read_bridge_bases(struct pci_bus *child)
> }
> }
>
> -static struct pci_bus *pci_alloc_bus(struct pci_bus *parent)
> +static struct pci_bus *pci_alloc_bus(void)
> {
> struct pci_bus *b;
>
> @@ -496,10 +496,7 @@ static struct pci_bus *pci_alloc_bus(struct pci_bus *parent)
> INIT_LIST_HEAD(&b->resources);
> b->max_bus_speed = PCI_SPEED_UNKNOWN;
> b->cur_bus_speed = PCI_SPEED_UNKNOWN;
> -#ifdef CONFIG_PCI_DOMAINS_GENERIC
> - if (parent)
> - b->domain_nr = parent->domain_nr;
> -#endif
> +
> return b;
> }
>
> @@ -646,7 +643,7 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
> /*
> * Allocate a new bus, and inherit stuff from the parent..
> */
> - child = pci_alloc_bus(parent);
> + child = pci_alloc_bus();
> if (!child)
> return NULL;
>
> @@ -1866,14 +1863,13 @@ static struct pci_bus *pci_create_root_bus(
> char *fmt;
>
> parent = bridge->dev.parent;
> - b = pci_alloc_bus(NULL);
> + b = pci_alloc_bus();
> if (!b)
> return NULL;
>
> b->sysdata = dev_get_drvdata(&bridge->dev);
> b->ops = ops;
> b->number = b->busn_res.start = bridge->busnum;
> - pci_bus_assign_domain_nr(b, parent);
>
> bridge->bus = b;
> b->bridge = get_device(&bridge->dev);
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index dc1c710..ebc70bb 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -467,9 +467,6 @@ struct pci_bus {
> unsigned char primary; /* number of primary bridge */
> unsigned char max_bus_speed; /* enum pci_bus_speed */
> unsigned char cur_bus_speed; /* enum pci_bus_speed */
> -#ifdef CONFIG_PCI_DOMAINS_GENERIC
> - int domain_nr;
> -#endif
>
> char name[48];
>
> --
> 1.7.1
>


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