Messages in this thread | | | Subject | Re: [PATCH] bcma: Prevent build of PCI host features in module | From | Matt Redfearn <> | Date | Mon, 15 Jan 2018 11:16:57 +0000 |
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Hi Kalle,
On 15/01/18 10:07, Kalle Valo wrote: > Matt Redfearn <matt.redfearn@mips.com> writes: > >> Attempting to build bcma.ko with BCMA_DRIVER_PCI_HOSTMODE=y results in >> a build error due to use of symbols not exported from vmlinux: >> >> ERROR: "pcibios_enable_device" [drivers/bcma/bcma.ko] undefined! >> ERROR: "register_pci_controller" [drivers/bcma/bcma.ko] undefined! >> make[1]: *** [scripts/Makefile.modpost:92: __modpost] Error 1 >> >> To prevent this, don't allow the host mode feature to be built if >> CONFIG_BCMA=m >> >> Signed-off-by: Matt Redfearn <matt.redfearn@mips.com> >> >> --- >> >> drivers/bcma/Kconfig | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/drivers/bcma/Kconfig b/drivers/bcma/Kconfig >> index 02d78f6cecbb..4294784b9cf1 100644 >> --- a/drivers/bcma/Kconfig >> +++ b/drivers/bcma/Kconfig >> @@ -55,7 +55,7 @@ config BCMA_DRIVER_PCI >> >> config BCMA_DRIVER_PCI_HOSTMODE >> bool "Driver for PCI core working in hostmode" >> - depends on MIPS && BCMA_DRIVER_PCI >> + depends on MIPS && BCMA_DRIVER_PCI && BCMA = y > > Is this a new regression? Do you know the commit which broke this?
As far as I can see, pcibios_enable_device and register_pci_controller have never being exported symbols from vmlinux, and an allmodconfig build with CONFIG_MIPS_COBALT=y (MIPS cobalt platform) which attempts to put this this functionality into a module would never have linked successfully. As such it can be traced back to when this functionality was added, 49dc9577155576b10ff79f0c1486c816b01f58bf ("bcma: add PCIe host controller").
> > Is it somehow related to this: > > bcma: Fix 'allmodconfig' and BCMA builds on MIPS targets > https://patchwork.kernel.org/patch/10162839/ > > Or are these two separate issues? >
Separate issues - that one fixes allmodconfig when CONFIG_MIPS_GENERIC=y (MIPS generic platform) which does not define the struct pci_controller - that error was really introduced when that struct definition was removed for the generic platform by c5611df968047fb0b38156497b4242730ef66108 ("MIPS: PCI: Introduce CONFIG_PCI_DRIVERS_LEGACY").
I think both patches are valid since they fix errors building allmodconfig on 2 separate MIPS platforms.
Thanks, Matt
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