Messages in this thread Patch in this message | | | Date | Wed, 17 Jun 2009 19:03:57 -0600 | From | Alex Chiang <> | Subject | Re: linux-next: Tree for June 17 (pci/slot) |
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* Alex Chiang <achiang@hp.com>: > diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile > index ba6af16..0be4efd 100644 > --- a/drivers/pci/Makefile > +++ b/drivers/pci/Makefile > @@ -2,10 +2,11 @@ > # Makefile for the PCI bus specific drivers. > # > > -obj-y += access.o bus.o probe.o remove.o pci.o quirks.o slot.o \ > - pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \ > +obj-y += access.o bus.o probe.o remove.o pci.o quirks.o \ > + pci-driver.o search.o rom.o setup-res.o \ > irq.o > obj-$(CONFIG_PROC_FS) += proc.o > +obj-$(CONFIG_SYSFS) += slot.o pci-sysfs.o
Sigh, this won't work because the PCI core blithely assumes we have sysfs:
drivers/built-in.o: In function `pci_bus_add_device': /kio/work/achiang/kernels/linux-2.6/drivers/pci/bus.c:89: undefined reference to `pci_create_sysfs_dev_files' drivers/built-in.o: In function `pci_stop_dev': /kio/work/achiang/kernels/linux-2.6/drivers/pci/remove.c:24: undefined reference to `pci_remove_sysfs_dev_files'
So, here is v3 that actually does build with !CONFIG_SYSFS. It touches a bit more now, but I believe it is still appropriate because neither pci_slot.ko nor any of the drivers in drivers/pci/hotplug/ are useful without sysfs.
From: Alex Chiang <achiang@hp.com>
PCI: drivers/pci/slot.c should depend on CONFIG_SYSFS
There is no way to interact with a physical PCI slot without sysfs, so encode the dependency and prevent this build error:
drivers/pci/slot.c: In function 'pci_hp_create_module_link': drivers/pci/slot.c:327: error: 'module_kset' undeclared
This patch _should_ make pci-sysfs.o depend on CONFIG_SYSFS too, but we cannot (yet) because the PCI core merrily assumes the existence of sysfs:
drivers/built-in.o: In function `pci_bus_add_device': drivers/pci/bus.c:89: undefined reference to `pci_create_sysfs_dev_files' drivers/built-in.o: In function `pci_stop_dev': drivers/pci/remove.c:24: undefined reference to `pci_remove_sysfs_dev_files'
So do the minimal bit for now and figure out how to untangle it later.
Cc: Len Brown <lenb@kernel.org> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Fix-suggested-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: Alex Chiang <achiang@hp.com> --- diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 431f8b4..7ec7d88 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -266,6 +266,7 @@ config ACPI_DEBUG_FUNC_TRACE config ACPI_PCI_SLOT tristate "PCI slot detection driver" + depends on SYSFS default n help This driver creates entries in /sys/bus/pci/slots/ for all PCI diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile index ba6af16..ed32f67 100644 --- a/drivers/pci/Makefile +++ b/drivers/pci/Makefile @@ -2,10 +2,11 @@ # Makefile for the PCI bus specific drivers. # -obj-y += access.o bus.o probe.o remove.o pci.o quirks.o slot.o \ +obj-y += access.o bus.o probe.o remove.o pci.o quirks.o \ pci-driver.o search.o pci-sysfs.o rom.o setup-res.o \ irq.o obj-$(CONFIG_PROC_FS) += proc.o +obj-$(CONFIG_SYSFS) += slot.o # Build PCI Express stuff if needed obj-$(CONFIG_PCIEPORTBUS) += pcie/ diff --git a/drivers/pci/hotplug/Kconfig b/drivers/pci/hotplug/Kconfig index 9aa4fe1..522c360 100644 --- a/drivers/pci/hotplug/Kconfig +++ b/drivers/pci/hotplug/Kconfig @@ -4,7 +4,7 @@ menuconfig HOTPLUG_PCI tristate "Support for PCI Hotplug" - depends on PCI && HOTPLUG + depends on PCI && HOTPLUG && SYSFS ---help--- Say Y here if you have a motherboard with a PCI Hotplug controller. This allows you to add and remove PCI cards while the machine is
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