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Date: Tue, 3 Mar 2015 11:41:38 +0800
From: Yijing Wang <wangyijing@...wei.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>
CC: Jiang Liu <jiang.liu@...ux.intel.com>, <linux-pci@...r.kernel.org>,
Yinghai Lu <yinghai@...nel.org>,
<linux-kernel@...r.kernel.org>,
Marc Zyngier <marc.zyngier@....com>,
<linux-arm-kernel@...ts.infradead.org>,
Russell King <linux@....linux.org.uk>, <x86@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Rusty Russell <rusty@...tcorp.com.au>,
Tony Luck <tony.luck@...el.com>, <linux-ia64@...r.kernel.org>,
"David S. Miller" <davem@...emloft.net>,
"Guan Xuetao" <gxt@...c.pku.edu.cn>, <linux-alpha@...r.kernel.org>,
<linux-m68k@...ts.linux-m68k.org>, Liviu Dudau <liviu@...au.co.uk>,
"Arnd Bergmann" <arnd@...db.de>,
Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH v4 05/30] PCI: Rename pci_scan_bus() to pci_scan_bus_legacy()
On 2015/3/3 10:06, Bjorn Helgaas wrote:
> On Thu, Feb 26, 2015 at 04:11:59PM +0800, Yijing Wang wrote:
>> Pci_scan_bus() is called by legacy pci host drivers,
>> the legacy host drivers mean they use NULL as parent
>> device, use all IO/MEM as default resources. Rename
>> pci_scan_bus() to pci_scan_bus_legacy() for better
>> readability.
>
> We should mention that this changes an exported symbol, because that's
> potentially an issue for distros.
>
> I'm not saying we can't change it, but I don't want to do it unless there's
> real benefit. I'm not convinced of the benefit yet, but maybe I will be by
> the end of the series.
>
Ok, I would move this one out of this series temporarily.
>> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
>> ---
>> arch/alpha/kernel/sys_nautilus.c | 2 +-
>> arch/m68k/coldfire/pci.c | 2 +-
>> arch/sparc/kernel/pcic.c | 2 +-
>> arch/unicore32/kernel/pci.c | 2 +-
>> drivers/pci/hotplug/ibmphp_core.c | 2 +-
>> drivers/pci/probe.c | 4 ++--
>> include/linux/pci.h | 2 +-
>> 7 files changed, 8 insertions(+), 8 deletions(-)
>>
>> diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
>> index 4ae4a40..2c864bb 100644
>> --- a/arch/alpha/kernel/sys_nautilus.c
>> +++ b/arch/alpha/kernel/sys_nautilus.c
>> @@ -206,7 +206,7 @@ nautilus_init_pci(void)
>> unsigned long memtop = max_low_pfn << PAGE_SHIFT;
>>
>> /* Scan our single hose. */
>> - bus = pci_scan_bus(0, alpha_mv.pci_ops, hose);
>> + bus = pci_scan_bus_legacy(0, alpha_mv.pci_ops, hose);
>> hose->bus = bus;
>> pcibios_claim_one_bus(bus);
>>
>> diff --git a/arch/m68k/coldfire/pci.c b/arch/m68k/coldfire/pci.c
>> index d45f087..0ef4dd4 100644
>> --- a/arch/m68k/coldfire/pci.c
>> +++ b/arch/m68k/coldfire/pci.c
>> @@ -312,7 +312,7 @@ static int __init mcf_pci_init(void)
>> set_current_state(TASK_UNINTERRUPTIBLE);
>> schedule_timeout(msecs_to_jiffies(200));
>>
>> - rootbus = pci_scan_bus(0, &mcf_pci_ops, NULL);
>> + rootbus = pci_scan_bus_legacy(0, &mcf_pci_ops, NULL);
>> rootbus->resource[0] = &mcf_pci_io;
>> rootbus->resource[1] = &mcf_pci_mem;
>>
>> diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
>> index 7a82fe2..f7edc97 100644
>> --- a/arch/sparc/kernel/pcic.c
>> +++ b/arch/sparc/kernel/pcic.c
>> @@ -390,7 +390,7 @@ static void __init pcic_pbm_scan_bus(struct linux_pcic *pcic)
>> {
>> struct linux_pbm_info *pbm = &pcic->pbm;
>>
>> - pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, &pcic_ops, pbm);
>> + pbm->pci_bus = pci_scan_bus_legacy(pbm->pci_first_busno, &pcic_ops, pbm);
>> if (pbm->pci_bus)
>> pci_bus_add_devices(pbm->pci_bus);
>> #if 0 /* deadwood transplanted from sparc64 */
>> diff --git a/arch/unicore32/kernel/pci.c b/arch/unicore32/kernel/pci.c
>> index 3d82024..2e238b4 100644
>> --- a/arch/unicore32/kernel/pci.c
>> +++ b/arch/unicore32/kernel/pci.c
>> @@ -258,7 +258,7 @@ static int __init pci_common_init(void)
>>
>> pci_puv3_preinit();
>>
>> - puv3_bus = pci_scan_bus(0, &pci_puv3_ops, NULL);
>> + puv3_bus = pci_scan_bus_legacy(0, &pci_puv3_ops, NULL);
>>
>> if (!puv3_bus)
>> panic("PCI: unable to scan bus!");
>> diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c
>> index 86e3bfd..4ade1b4 100644
>> --- a/drivers/pci/hotplug/ibmphp_core.c
>> +++ b/drivers/pci/hotplug/ibmphp_core.c
>> @@ -765,7 +765,7 @@ static u8 bus_structure_fixup(u8 busno)
>> (l != 0x0000) && (l != 0xffff)) {
>> debug("%s - Inside bus_structure_fixup()\n",
>> __func__);
>> - b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
>> + b = pci_scan_bus_legacy(busno, ibmphp_pci_bus->ops, NULL);
>> if (b)
>> pci_bus_add_devices(b);
>> break;
>> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
>> index 699a238..ccab9b1 100644
>> --- a/drivers/pci/probe.c
>> +++ b/drivers/pci/probe.c
>> @@ -2091,7 +2091,7 @@ struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
>> }
>> EXPORT_SYMBOL(pci_scan_root_bus);
>>
>> -struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
>> +struct pci_bus *pci_scan_bus_legacy(int bus, struct pci_ops *ops,
>> void *sysdata)
>> {
>> LIST_HEAD(resources);
>> @@ -2108,7 +2108,7 @@ struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops,
>> }
>> return b;
>> }
>> -EXPORT_SYMBOL(pci_scan_bus);
>> +EXPORT_SYMBOL(pci_scan_bus_legacy);
>>
>> /**
>> * pci_rescan_bus_bridge_resize - scan a PCI bus for devices.
>> diff --git a/include/linux/pci.h b/include/linux/pci.h
>> index 36effb8..6dffc57 100644
>> --- a/include/linux/pci.h
>> +++ b/include/linux/pci.h
>> @@ -769,7 +769,7 @@ void pcibios_bus_to_resource(struct pci_bus *bus, 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(int bus, struct pci_ops *ops, void *sysdata);
>> +struct pci_bus *pci_scan_bus_legacy(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,
>> struct list_head *resources);
>> --
>> 1.7.1
>>
>
> .
>
--
Thanks!
Yijing
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