[intel-linux-intel-lts:4.19/android_r 18600/24638] drivers/usb/host/xhci-dbgcap.c:191:6: warning: no previous prototype for function 'xhci_dbc_flush_requests'

[intel-linux-intel-lts:4.19/android_r 18600/24638] drivers/usb/host/xhci-dbgcap.c:191:6: warning: no previous prototype for function 'xhci_dbc_flush_requests'

[kernel test robot]

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tree:   https://github.com/intel/linux-intel-lts.git 4.19/android_r
head:   9f2d2ee2b02288b762796b8d0d95a1d6bf805cab
commit: b88d999a5b9ae9022e12e1a5810b12b21cb77996 [18600/24638] usb: xhci: dbc: make DbC modular, introducing dbc_function structure
config: x86_64-randconfig-a015-20210906 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6fe2beba7d2a41964af658c8c59dd172683ef739)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel/linux-intel-lts/commit/b88d999a5b9ae9022e12e1a5810b12b21cb77996
        git remote add intel-linux-intel-lts https://github.com/intel/linux-intel-lts.git
        git fetch --no-tags intel-linux-intel-lts 4.19/android_r
        git checkout b88d999a5b9ae9022e12e1a5810b12b21cb77996
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from drivers/usb/host/xhci-dbgcap.c:9:
   In file included from include/linux/dma-mapping.h:7:
   In file included from include/linux/device.h:16:
   In file included from include/linux/kobject.h:20:
   In file included from include/linux/sysfs.h:16:
   In file included from include/linux/kernfs.h:14:
   In file included from include/linux/idr.h:15:
   In file included from include/linux/radix-tree.h:27:
   In file included from include/linux/preempt.h:81:
   In file included from arch/x86/include/asm/preempt.h:7:
   In file included from include/linux/thread_info.h:38:
   In file included from arch/x86/include/asm/thread_info.h:53:
   arch/x86/include/asm/cpufeature.h:164:2: error: implicit declaration of function 'asm_volatile_goto' [-Werror,-Wimplicit-function-declaration]
           asm_volatile_goto("1: jmp 6f\n"
           ^
   arch/x86/include/asm/cpufeature.h:195:4: error: expected ')'
                    : : [feature]  "i" (bit),
                    ^
   arch/x86/include/asm/cpufeature.h:164:19: note: to match this '('
           asm_volatile_goto("1: jmp 6f\n"
                            ^
>> drivers/usb/host/xhci-dbgcap.c:191:6: warning: no previous prototype for function 'xhci_dbc_flush_requests' [-Wmissing-prototypes]
   void xhci_dbc_flush_requests(struct xhci_dbc *dbc)
        ^
   drivers/usb/host/xhci-dbgcap.c:191:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void xhci_dbc_flush_requests(struct xhci_dbc *dbc)
   ^
   static 
>> drivers/usb/host/xhci-dbgcap.c:794:8: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
           int                     ret;
                                   ^
   2 warnings and 2 errors generated.


vim +/xhci_dbc_flush_requests +191 drivers/usb/host/xhci-dbgcap.c

   189	
   190	
 > 191	void xhci_dbc_flush_requests(struct xhci_dbc *dbc)
   192	{
   193		xhci_dbc_flush_endpoint_requests(&dbc->eps[BULK_OUT]);
   194		xhci_dbc_flush_endpoint_requests(&dbc->eps[BULK_IN]);
   195	}
   196	EXPORT_SYMBOL_GPL(xhci_dbc_flush_requests);
   197	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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