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Message-ID: <51B1FC83.7090402@gmail.com>
Date: Fri, 07 Jun 2013 23:30:11 +0800
From: Jiang Liu <liuj97@...il.com>
To: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC: Bjorn Helgaas <bhelgaas@...gle.com>,
Yinghai Lu <yinghai@...nel.org>,
Jiang Liu <jiang.liu@...wei.com>,
"Rafael J . Wysocki" <rjw@...k.pl>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Gu Zheng <guz.fnst@...fujitsu.com>,
Toshi Kani <toshi.kani@...com>,
Myron Stowe <myron.stowe@...hat.com>,
Yijing Wang <wangyijing@...wei.com>,
"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Chris Metcalf <cmetcalf@...era.com>,
Thierry Reding <thierry.reding@...onic-design.de>,
Jeremy Fitzhardinge <jeremy@...p.org>,
xen-devel <xen-devel@...ts.xensource.com>
Subject: Re: [PATCH v3, part1 04/10] PCI: mark pci_scan_bus_parented() as
__deprecated
On 06/07/2013 10:37 PM, Konrad Rzeszutek Wilk wrote:
> On Fri, Jun 07, 2013 at 12:32:28AM +0800, Jiang Liu wrote:
>> On Thu 06 Jun 2013 04:04:36 AM CST, Bjorn Helgaas wrote:
>>> [+cc Konrad, Jeremy, xen-devel (users of interface you're deprecating)]
>>>
>>> On Sat, May 25, 2013 at 7:48 AM, Jiang Liu <liuj97@...il.com> wrote:
>>>> Mark pci_scan_bus_parented() as __deprecated and clean up outdated
>>>> comments.
>>>>
>>>> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
>>>> Cc: Chris Metcalf <cmetcalf@...era.com>
>>>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>>>> Cc: Thierry Reding <thierry.reding@...onic-design.de>
>>>> Cc: linux-kernel@...r.kernel.org
>>>> Cc: linux-pci@...r.kernel.org
>>>> ---
>>>> arch/tile/kernel/pci.c | 3 ---
>>>> include/linux/pci.h | 4 ++--
>>>> 2 files changed, 2 insertions(+), 5 deletions(-)
>>>>
>>>> diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
>>>> index 67237d3..936e087 100644
>>>> --- a/arch/tile/kernel/pci.c
>>>> +++ b/arch/tile/kernel/pci.c
>>>> @@ -309,9 +309,6 @@ int __init pcibios_init(void)
>>>> *
>>>> * It reads the PCI tree for this bus into the Linux
>>>> * data structures.
>>>> - *
>>>> - * This is inlined in linux/pci.h and calls into
>>>> - * pci_scan_bus_parented() in probe.c.
>>>> */
>>>> pci_add_resource(&resources, &ioport_resource);
>>>> pci_add_resource(&resources, &iomem_resource);
>>>> diff --git a/include/linux/pci.h b/include/linux/pci.h
>>>> index b0f4a82..7b23fa0 100644
>>>> --- a/include/linux/pci.h
>>>> +++ b/include/linux/pci.h
>>>> @@ -720,8 +720,8 @@ void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
>>>> void pcibios_scan_specific_bus(int busn);
>>>> struct pci_bus *pci_find_bus(int domain, int busnr);
>>>> void pci_bus_add_devices(const struct pci_bus *bus);
>>>> -struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
>>>> - struct pci_ops *ops, void *sysdata);
>>>> +struct pci_bus * __deprecated pci_scan_bus_parented(struct device *parent,
>>>> + int bus, struct pci_ops *ops, void *sysdata);
>>>> struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
>>>> struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
>>>> struct pci_ops *ops, void *sysdata,
>>>
>>> I think this patch is a good idea, but I think we need to change the
>>> only existing user of pci_scan_bus_parented() (pcifront_scan_root() in
>>> drivers/pci/xen-pcifront.c) at the same time, so xen doesn't start
>>> getting build warnings. The deprecation warnings are really intended
>>> for out-of-tree users that we aren't able to fix ourselves.
>>>
>>> I'm getting this series queued up in
>>> http://git.kernel.org/cgit/linux/kernel/git/helgaas/pci.git/log/?h=pci/jiang-bus-lock-v3,
>>> so if you want to send a patch just for xen, I can fold that in.
>>>
>>> Bjorn
>> Hi Bjorn,
>> I have posted a big patch for that, but still need help from
>> Xen experts to review it.
>> Please refer to https://patchwork.kernel.org/patch/2578551/
>
> Hm, I seem to get:
>
> /home/konrad/linux/drivers/pci/xen-pcifront.c: In function ‘pcifront_free_roots’:
> /home/konrad/linux/drivers/pci/xen-pcifront.c:559: error: implicit declaration of function ‘for_each_pci_root_bus’
> /home/konrad/linux/drivers/pci/xen-pcifront.c:559: error: expected ‘;’ before ‘{’ token
> /home/konrad/linux/drivers/pci/xen-pcifront.c:554: warning: unused variable ‘sd’
>
> with it? Is there an up-to-date patch?
> I have these in my tree:
>
> 311db40 PCI, xen-pcifront: use new PCI interfaces to simplify implementation
> 4079fee Merge remote-tracking branch 'bjorn/pci/jiang-bus-lock-v3' into testing
> ddb7c6b PCI: Hide remove and rescan sysfs interfaces for SR-IOV virtual functions
> f5cfa3a PCI: Simplify IOV implementation and fix reference count races
> 28b4f07 PCI: Drop redundant setting of bus->is_added in virtfn_add_bus()
> 442655a unicore32/PCI: Remove redundant call of pci_bus_add_devices()
> defd601 m68k/PCI: Remove redundant call of pci_bus_add_devices()
> 340e3fb PCI: Make PCI host bridge/bus creating and destroying logic symmetric
> c7025f7 ia64/PCI: Clean up pci_scan_root_bus() usage
> c1f41ce PCI: Mark pci_scan_bus_parented() as __deprecated
> 13e5057 PCI: Convert alloc_pci_dev(void) to pci_alloc_dev(bus)
> 007042a PCI: Introduce pci_alloc_dev(struct pci_bus*) to replace alloc_pci_dev()
> fe830ef PCI: Introduce pci_bus_{get|put}() to manage PCI bus reference count
Hi Konrad,
Could you please help to apply this simple patch onto to your tree?
It should fix the build failure issue.
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 79ad229..b5e0e66 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -556,7 +556,7 @@ static void pcifront_free_roots(struct
pcifront_device *pdev)
dev_dbg(&pdev->xdev->dev, "cleaning up root buses\n");
- for_each_pci_root_bus(bus) {
+ list_for_each_entry(bus, &pci_root_buses, node) {
sd = bus->sysdata;
if (sd->pdev == pdev) {
pci_stop_root_bus(bus);
>
> Also oddly enough your SoB does not match your Author. Here is
> what git shows:
>
> === > Author: Jiang Liu <liuj97@...il.com> 2013-05-25 09:48:38
>
> === > Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
>
> You can add in the gmail an new 'email alias' so that the emails will
> look as they come from your huawei address.
>
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