tree: https://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux.git for-review/acpi-iort-id-rework head: 4582b00b57ab0807e87d54621173a29352109551 commit: b5e9dd56ea850bb71fb0532c7d4be9d5e82132e6 [8/11] of/irq: make of_msi_map_get_device_domain bus agnostic config: i386-defconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout b5e9dd56ea850bb71fb0532c7d4be9d5e82132e6 # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from drivers/pci/msi.c:25:0: { ^ static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from drivers/base/platform.c:15:0: { ^ In file included from drivers/base/platform.c:15:0: include/linux/of_irq.h:87:34: warning: 'of_msi_map_get_device_domain' declared 'static' but never defined [-Wunused-function] static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +89 include/linux/of_irq.h 4c3141e09cfa64 Carlo Caione 2015-12-01 80 48ae34fb39b0c0 Marc Zyngier 2015-09-18 81 static inline struct irq_domain *of_msi_get_domain(struct device *dev, 48ae34fb39b0c0 Marc Zyngier 2015-09-18 82 struct device_node *np, 48ae34fb39b0c0 Marc Zyngier 2015-09-18 83 enum irq_domain_bus_token token) 48ae34fb39b0c0 Marc Zyngier 2015-09-18 84 { 48ae34fb39b0c0 Marc Zyngier 2015-09-18 85 return NULL; 48ae34fb39b0c0 Marc Zyngier 2015-09-18 86 } 82b9b4243c6d99 Marc Zyngier 2015-10-02 @87 static inline struct irq_domain *of_msi_map_get_device_domain(struct device *dev, b5e9dd56ea850b Diana Craciun 2020-04-29 88 u32 id, u32 bus_token); 82b9b4243c6d99 Marc Zyngier 2015-10-02 @89 { 82b9b4243c6d99 Marc Zyngier 2015-10-02 90 return NULL; 82b9b4243c6d99 Marc Zyngier 2015-10-02 91 } f9f9f11dcf0f3b Jonas Gorski 2015-10-12 92 static inline void of_msi_configure(struct device *dev, struct device_node *np) f9f9f11dcf0f3b Jonas Gorski 2015-10-12 93 { f9f9f11dcf0f3b Jonas Gorski 2015-10-12 94 } eaddb5725357e9 Rob Herring 2015-12-09 95 static inline u32 of_msi_map_rid(struct device *dev, eaddb5725357e9 Rob Herring 2015-12-09 96 struct device_node *msi_np, u32 rid_in) eaddb5725357e9 Rob Herring 2015-12-09 97 { eaddb5725357e9 Rob Herring 2015-12-09 98 return rid_in; eaddb5725357e9 Rob Herring 2015-12-09 99 } a8d3f362f52b65 Rob Herring 2013-11-07 100 #endif a8d3f362f52b65 Rob Herring 2013-11-07 101 :::::: The code at line 89 was first introduced by commit :::::: 82b9b4243c6d99d9e38087fa89183aa7479185e9 of/irq: Use the msi-map property to provide device-specific MSI domain :::::: TO: Marc Zyngier <marc.zyngier(a)arm.com&gt; :::::: CC: Marc Zyngier <marc.zyngier(a)arm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org