[ammarfaizi2-block:google/android/kernel/common/android14-5.15 5/11] arch/arm64/kvm/hyp/nvhe/trace.c:190:15: warning: no previous prototype for function 'rb_event_size'

[ammarfaizi2-block:google/android/kernel/common/android14-5.15 5/11] arch/arm64/kvm/hyp/nvhe/trace.c:190:15: warning: no previous prototype for function 'rb_event_size'

[kernel test robot]

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android14-5.15
head:   8e245b4c3a574fbb94b6b655f84e071febc147a6
commit: eab8f11bed73de6ca0cfe5a6897f53e0a1560bfb [5/11] ANDROID: KVM: arm64: Add tracing support for the nVHE hyp
config: arm64-randconfig-r032-20230213 (https://download.01.org/0day-ci/archive/20230214/202302141536.IzACdpqv-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/ammarfaizi2/linux-block/commit/eab8f11bed73de6ca0cfe5a6897f53e0a1560bfb
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android14-5.15
        git checkout eab8f11bed73de6ca0cfe5a6897f53e0a1560bfb
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kvm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302141536.IzACdpqv-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/arm64/kvm/hyp/nvhe/trace.c:150:49: warning: variable 'new_head' set but not used [-Wunused-but-set-variable]
           struct hyp_buffer_page *tail_page, *new_tail, *new_head;
                                                          ^
>> arch/arm64/kvm/hyp/nvhe/trace.c:190:15: warning: no previous prototype for function 'rb_event_size' [-Wmissing-prototypes]
   unsigned long rb_event_size(unsigned long length)
                 ^
   arch/arm64/kvm/hyp/nvhe/trace.c:190:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   unsigned long rb_event_size(unsigned long length)
   ^
   static 
   2 warnings generated.


vim +/rb_event_size +190 arch/arm64/kvm/hyp/nvhe/trace.c

   189	
 > 190	unsigned long rb_event_size(unsigned long length)
   191	{
   192		struct ring_buffer_event *event;
   193	
   194		return length + RB_EVNT_HDR_SIZE + sizeof(event->array[0]);
   195	}
   196	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests