[kbuild-all] [usb:usb-testing 57/64] drivers/usb/host/xhci-pci.h:13:5: warning: no previous prototype for 'renesas_xhci_check_request_fw'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing head: df00731cffa0edb454ee0c490696ce0c1745e680 commit: a66d21d7dba84deeaf3b296c43eafc11094b6f09 [57/64] usb: xhci: Add support for Renesas controller with memory config: m68k-randconfig-r012-20200519 (attached as .config) compiler: m68k-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout a66d21d7dba84deeaf3b296c43eafc11094b6f09 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from arch/m68k/include/asm/bug.h:32, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from include/asm-generic/preempt.h:5, from ./arch/m68k/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from arch/m68k/include/asm/irqflags.h:6, from include/linux/irqflags.h:16, from arch/m68k/include/asm/atomic.h:6, from include/linux/atomic.h:7, from include/linux/mutex.h:18, from include/linux/kernfs.h:12, from include/linux/sysfs.h:16, from include/linux/kobject.h:20, from include/linux/pci.h:35, from drivers/usb/host/xhci-pci.c:11: include/linux/dma-mapping.h: In function 'dma_map_resource': arch/m68k/include/asm/page_mm.h:169:49: warning: ordered comparison of pointer with null pointer [-Wextra] 169 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) | ^~ include/asm-generic/bug.h:139:27: note: in definition of macro 'WARN_ON_ONCE' 139 | int __ret_warn_once = !!(condition); | ^~~~~~~~~ arch/m68k/include/asm/page_mm.h:170:25: note: in expansion of macro 'virt_addr_valid' 170 | #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) | ^~~~~~~~~~~~~~~ include/linux/dma-mapping.h:352:19: note: in expansion of macro 'pfn_valid' 352 | if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr)))) | ^~~~~~~~~ In file included from drivers/usb/host/xhci-pci.c:18: drivers/usb/host/xhci-pci.h: At top level: 13 | int renesas_xhci_check_request_fw(struct pci_dev *dev, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 19 | void renesas_xhci_pci_exit(struct pci_dev *dev) { }; | ^~~~~~~~~~~~~~~~~~~~~ vim +/renesas_xhci_check_request_fw +13 drivers/usb/host/xhci-pci.h 8bd5741e3145e4 Christian Lamparter 2020-05-14 11 8bd5741e3145e4 Christian Lamparter 2020-05-14 12 #else 8bd5741e3145e4 Christian Lamparter 2020-05-14 @13 int renesas_xhci_check_request_fw(struct pci_dev *dev, 8bd5741e3145e4 Christian Lamparter 2020-05-14 14 const struct pci_device_id *id) 8bd5741e3145e4 Christian Lamparter 2020-05-14 15 { 8bd5741e3145e4 Christian Lamparter 2020-05-14 16 return 0; 8bd5741e3145e4 Christian Lamparter 2020-05-14 17 } 8bd5741e3145e4 Christian Lamparter 2020-05-14 18 8bd5741e3145e4 Christian Lamparter 2020-05-14 @19 void renesas_xhci_pci_exit(struct pci_dev *dev) { }; 8bd5741e3145e4 Christian Lamparter 2020-05-14 20 :::::: The code at line 13 was first introduced by commit :::::: 8bd5741e3145e40c1e4f422fa5f1b9d7fe0644b3 usb: renesas-xhci: Add the renesas xhci driver :::::: TO: Christian Lamparter <chunkeey(a)googlemail.com&gt; :::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org