From 57833f84f6f5967134c9c1119289f7acdd1c93e9 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Tue, 14 Oct 2025 11:20:27 -0700 Subject: [PATCH] PCI: rcar-host: Add OF Kconfig dependency to avoid objtool no-cfi warning After commit 894af4a1cde6 ("objtool: Validate kCFI calls"), compile testing pcie-rcar-host.c with CONFIG_FINEIBT=y and CONFIG_OF=n results in a no-cfi objtool warning in rcar_pcie_probe(): $ cat allno.config CONFIG_CFI=y CONFIG_COMPILE_TEST=y CONFIG_CPU_MITIGATIONS=y CONFIG_GENERIC_PHY=y CONFIG_MITIGATION_RETPOLINE=y CONFIG_MODULES=y CONFIG_PCI=y CONFIG_PCI_MSI=y CONFIG_PCIE_RCAR_HOST=y CONFIG_X86_KERNEL_IBT=y $ make -skj"$(nproc)" ARCH=x86_64 KCONFIG_ALLCONFIG=1 LLVM=1 clean allnoconfig vmlinux vmlinux.o: warning: objtool: rcar_pcie_probe+0x191: no-cfi indirect call! When CONFIG_OF is unset, of_device_get_match_data() returns NULL, so LLVM knows this indirect call has no valid destination and drops the kCFI setup before the call, triggering the objtool check that makes sure all indirect calls have kCFI setup. This driver depends on OF for probing with non-NULL data for every match so this call will never be NULL in practice. Add a hard Kconfig dependency on OF to avoid the warning. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202510092124.O2IX0Jek-lkp@intel.com/ Closes: https://github.com/ClangBuiltLinux/linux/issues/2134 Signed-off-by: Nathan Chancellor Signed-off-by: Manivannan Sadhasivam Link: https://patch.msgid.link/20251014-rcar_pcie_probe-avoid-nocfi-objtool-warning-v2-1-6e0204b002c6@kernel.org --- drivers/pci/controller/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index c254d2b8bf17..2adf28949bec 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -243,6 +243,7 @@ config PCI_TEGRA config PCIE_RCAR_HOST bool "Renesas R-Car PCIe controller (host mode)" depends on ARCH_RENESAS || COMPILE_TEST + depends on OF depends on PCI_MSI select IRQ_MSI_LIB help