Re: [REGRESSION] linux-pci/next: (build)‘PCIE_PORT_LANE_SKEW’ undeclared (first use in this function); did ...

[Bjorn Helgaas <helgaas@kernel.org>]

[+cc Marek, Hans, just FYI, no action needed]

On Wed, Sep 30, 2026 at 10:00:24PM -0000, KernelCI bot wrote:
> New build issue found on linux-pci/next:
> 
> ---
> ‘PCIE_PORT_LANE_SKEW’ undeclared (first use in this function); did you mean ‘PORT_LANE_SKEW’? in drivers/pci/controller/dwc/pcie-rcar-gen4.o (drivers/pci/controller/dwc/pcie-rcar-gen4.c) [logspec:kbuild,kbuild.compiler.error]
> ---
> 
> Log excerpt:
> =====================================================
> drivers/pci/controller/dwc/pcie-rcar-gen4.c:307:37: error: ‘PCIE_PORT_LANE_SKEW’ undeclared (first use in this function); did you mean ‘PORT_LANE_SKEW’?
>   307 |         val = dw_pcie_readl_dbi(dw, PCIE_PORT_LANE_SKEW);
>       |                                     ^~~~~~~~~~~~~~~~~~~
>       |                                     PORT_LANE_SKEW
> drivers/pci/controller/dwc/pcie-rcar-gen4.c:307:37: note: each undeclared identifier is reported only once for each function it appears in
> drivers/pci/controller/dwc/pcie-rcar-gen4.c: In function ‘rcar_gen5_pcie_init’:
> drivers/pci/controller/dwc/pcie-rcar-gen4.c:338:37: error: ‘PCIE_PORT_LANE_SKEW’ undeclared (first use in this function); did you mean ‘PORT_LANE_SKEW’?
>   338 |         val = dw_pcie_readl_dbi(dw, PCIE_PORT_LANE_SKEW);
>       |                                     ^~~~~~~~~~~~~~~~~~~
>       |                                     PORT_LANE_SKEW
>   CC [M]  sound/soc/codecs/da7219.o
> 
> =====================================================

Conflict between pci/controller/dwc, which renamed PCIE_PORT_LANE_SKEW
to PORT_LANE_SKEW, and pci/controller/dwc-rcar-gen4, which added uses
of PCIE_PORT_LANE_SKEW in rcar_gen5_pcie_init().

Fixed the merge conflict locally.

> When fixing this issue, please attribute this report according to the
> patch submission rules:
> 
> Reported-by: kernelci.org bot <bot@kernelci.org>
> 
> For complete logs and details about the environment used, see the issue
> on the KernelCI dashboard:
> 
> - dashboard: https://d.kernelci.org/i/maestro:9c96bb06403e0f385b3d6d522f160cd82ba4b932
> - giturl: https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git
> - commit HEAD:  bc80f6c85a8e97bdb69604f82af37179fcb01c38
> 
> # Builds where the incident occurred:
> 
> ## defconfig+arm64-chromebook+kcidebug+kcidebug-arm64+lab-setup on (arm64):
> - compiler: gcc-14
> - config: None
> - dashboard: https://d.kernelci.org/build/maestro:6abd7df914cd2ca558e86834
> 
> ## defconfig+lab-setup on (arm64):
> - compiler: gcc-15
> - config: None
> - dashboard: https://d.kernelci.org/build/maestro:6abd7de014cd2ca558e8681d
> 
> ## defconfig+lab-setup+arm64-chromebook+CONFIG_MODULE_COMPRESS=n+CONFIG_MODULE_COMPRESS_NONE=y on (arm64):
> - compiler: gcc-14
> - config: https://files.kernelci.org/kbuild-gcc-14-arm64-chromebook-6abd7db714cd2ca558e86606/.config
> - dashboard: https://d.kernelci.org/build/maestro:6abd7db714cd2ca558e86606
> 
> ## defconfig+netdev+nfs-root-boot+kselftest on (arm64):
> - compiler: gcc-14
> - config: https://files.kernelci.org/kbuild-gcc-14-arm64-nfsboot-6abd7de614cd2ca558e86820/.config
> - dashboard: https://d.kernelci.org/build/maestro:6abd7de614cd2ca558e86820
> 
> ## defconfig+netdev+nfs-root-boot+kselftest on (arm64):
> - compiler: gcc-15
> - config: https://files.kernelci.org/kbuild-gcc-15-arm64-nfsboot-6abd7dea14cd2ca558e86823/.config
> - dashboard: https://d.kernelci.org/build/maestro:6abd7dea14cd2ca558e86823
> 
> ## defconfig+netdev+nfs-root-boot+ltp on (arm64):
> - compiler: gcc-15
> - config: https://files.kernelci.org/kbuild-gcc-15-arm64-nfsboot-ltp-6abd7def14cd2ca558e8682d/.config
> - dashboard: https://d.kernelci.org/build/maestro:6abd7def14cd2ca558e8682d
> 
> #kernelci issue maestro:9c96bb06403e0f385b3d6d522f160cd82ba4b932
> 
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