Re: [linux-next:master] BUILD REGRESSION c503e3eec382ac708ee7adf874add37b77c5d312

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On Tue, Oct 31, 2023 at 04:35:23AM +0800, kernel test robot wrote:
> tree/branch: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> branch HEAD: c503e3eec382ac708ee7adf874add37b77c5d312  Add linux-next specific files for 20231030
> 
> Error/Warning reports:
> ... 
> https://lore.kernel.org/oe-kbuild-all/202310302206.Pkr5eBDi-lkp@xxxxxxxxx

> Error/Warning: (recently discovered and may have been fixed)
> 
> Warning: MAINTAINERS references a file that doesn't exist: Documentation/devicetree/bindings/iio/imu/bosch,bma400.yaml
> aarch64-linux-ld: drivers/cxl/core/pci.c:921:(.text+0xbbc): undefined reference to `pci_print_aer'
> ...
> arch/riscv/include/asm/mmio.h:67:(.text+0xd66): undefined reference to `pci_print_aer'
> csky-linux-ld: pci.c:(.text+0x6e8): undefined reference to `pci_print_aer'
> drivers/cxl/core/pci.c:921: undefined reference to `pci_print_aer'
> drivers/cxl/core/pci.c:921:(.text+0xbc0): undefined reference to `pci_print_aer'
> ...
> ld: drivers/cxl/core/pci.c:921: undefined reference to `pci_print_aer'
> loongarch64-linux-ld: drivers/cxl/core/pci.c:921:(.text+0xa38): undefined reference to `pci_print_aer'
> pci.c:(.text+0x662): undefined reference to `pci_print_aer'
> powerpc-linux-ld: pci.c:(.text+0xf10): undefined reference to `pci_print_aer'
> riscv64-linux-ld: pci.c:(.text+0x11ec): undefined reference to `pci_print_aer'

I have no idea about the above (and all the similar ones below); I
assume they all have to do with
https://lore.kernel.org/r/20231018171713.1883517-13-rrichter@xxxxxxx

> Unverified Error/Warning (likely false positive, please contact us if interested):
> 
> drivers/pci/controller/dwc/pcie-rcar-gen4.c:439:15: warning: cast to smaller integer type 'enum dw_pcie_device_mode' from 'const void *' [-Wvoid-pointer-to-enum-cast]

Safe but annoying.  Yoshihiro, can you fix this by adding structs for
the of_device_id.data member instead of casting DW_PCIE_RC_TYPE and
DW_PCIE_EP_TYPE?  Examples here:

  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/dwc/pci-dra7xx.c?id=v6.6#n557
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/dwc/pci-keystone.c?id=v6.6#n1069
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/dwc/pcie-artpec6.c?id=v6.6#n452
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/dwc/pcie-designware-plat.c?id=v6.6#n159
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/dwc/pcie-keembay.c?id=v6.6#n437
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/dwc/pcie-tegra194.c?id=v6.6#n2431

Siddharth, since you're looking at keystone v3.65, it looks to me like
DW_PCIE_VER_365A is currently broken because ks_pcie_rc_of_data
doesn't set .mode, so it defaults to zero, and it looks like we should
end up at the INVALID device type case here:

  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/dwc/pci-keystone.c?id=v6.6#n1285

> |-- arm64-buildonly-randconfig-r003-20220511
> |   `-- aarch64-linux-ld:drivers-cxl-core-pci.c:(.text):undefined-reference-to-pci_print_aer

> |-- csky-randconfig-001-20231030
> |   |-- csky-linux-ld:pci.c:(.text):undefined-reference-to-pci_print_aer
> |   `-- pci.c:(.text):undefined-reference-to-pci_print_aer

> |-- i386-randconfig-141-20231030
> |   |-- ld:drivers-cxl-core-pci.c:undefined-reference-to-pci_print_aer

> |-- loongarch-randconfig-r014-20230225
> |   `-- drivers-cxl-core-pci.c:(.text):undefined-reference-to-pci_print_aer
> |-- loongarch-randconfig-r032-20220926
> |   `-- loongarch64-linux-ld:drivers-cxl-core-pci.c:(.text):undefined-reference-to-pci_print_aer

> |-- powerpc-randconfig-003-20231016
> |   `-- powerpc-linux-ld:pci.c:(.text):undefined-reference-to-pci_print_aer

> |-- riscv-randconfig-r002-20220124
> |   `-- arch-riscv-include-asm-mmio.h:(.text):undefined-reference-to-pci_print_aer
> |-- riscv-randconfig-r011-20220606
> |   `-- riscv64-linux-ld:pci.c:(.text):undefined-reference-to-pci_print_aer

> |-- x86_64-randconfig-x052-20230810
> |   `-- drivers-cxl-core-pci.c:undefined-reference-to-pci_print_aer



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