[ammarfaizi2-block:google/android/kernel/common/android14-5.15 9/11] arch/arm64/kvm/hyp_events.c:204:6: warning: no previous prototype for function 'kvm_hyp_events_enable_early'

[ammarfaizi2-block:google/android/kernel/common/android14-5.15 9/11] arch/arm64/kvm/hyp_events.c:204:6: warning: no previous prototype for function 'kvm_hyp_events_enable_early'

[kernel test robot]

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android14-5.15
head:   27e5fbdd8569f72e6fc38ffd7f3b6b4992099026
commit: 8f1f4a1b65a4aa9b4ab2c37052d08d59404a06db [9/11] ANDROID: KVM: arm64: add support for early enablement nVHE hyp events
config: arm64-randconfig-r032-20230213 (https://download.01.org/0day-ci/archive/20230214/202302142007.gWTNqVkp-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/8f1f4a1b65a4aa9b4ab2c37052d08d59404a06db
        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 8f1f4a1b65a4aa9b4ab2c37052d08d59404a06db
        # 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/202302142007.gWTNqVkp-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from arch/arm64/kvm/hyp_events.c:37:
   arch/arm64/include/asm/kvm_hypevents.h:14:1: warning: no previous prototype for function 'hyp_event_trace_hyp_enter' [-Wmissing-prototypes]
   HYP_EVENT(hyp_enter,
   ^
   arch/arm64/kvm/hyp_events.c:25:20: note: expanded from macro 'HYP_EVENT'
           enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
                             ^
   <scratch space>:80:1: note: expanded from here
   hyp_event_trace_hyp_enter
   ^
   arch/arm64/include/asm/kvm_hypevents.h:14:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/kvm/hyp_events.c:25:2: note: expanded from macro 'HYP_EVENT'
           enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
           ^
   In file included from arch/arm64/kvm/hyp_events.c:37:
   arch/arm64/include/asm/kvm_hypevents.h:23:1: warning: no previous prototype for function 'hyp_event_trace_hyp_exit' [-Wmissing-prototypes]
   HYP_EVENT(hyp_exit,
   ^
   arch/arm64/kvm/hyp_events.c:25:20: note: expanded from macro 'HYP_EVENT'
           enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
                             ^
   <scratch space>:85:1: note: expanded from here
   hyp_event_trace_hyp_exit
   ^
   arch/arm64/include/asm/kvm_hypevents.h:23:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   arch/arm64/kvm/hyp_events.c:25:2: note: expanded from macro 'HYP_EVENT'
           enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
           ^
>> arch/arm64/kvm/hyp_events.c:204:6: warning: no previous prototype for function 'kvm_hyp_events_enable_early' [-Wmissing-prototypes]
   bool kvm_hyp_events_enable_early(void)
        ^
   arch/arm64/kvm/hyp_events.c:204:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool kvm_hyp_events_enable_early(void)
   ^
   static 
   arch/arm64/kvm/hyp_events.c:239:6: warning: no previous prototype for function 'kvm_hyp_init_events_tracefs' [-Wmissing-prototypes]
   void kvm_hyp_init_events_tracefs(struct dentry *parent)
        ^
   arch/arm64/kvm/hyp_events.c:239:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void kvm_hyp_init_events_tracefs(struct dentry *parent)
   ^
   static 
   arch/arm64/kvm/hyp_events.c:271:5: warning: no previous prototype for function 'kvm_hyp_init_events' [-Wmissing-prototypes]
   int kvm_hyp_init_events(void)
       ^
   arch/arm64/kvm/hyp_events.c:271:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int kvm_hyp_init_events(void)
   ^
   static 
   5 warnings generated.


vim +/kvm_hyp_events_enable_early +204 arch/arm64/kvm/hyp_events.c

   203	
 > 204	bool kvm_hyp_events_enable_early(void)
   205	{
   206		char *token, *buf = early_events;
   207		bool enabled = false;
   208	
   209		while (true) {
   210			token = strsep(&buf, ",");
   211	
   212			if (!token)
   213				break;
   214	
   215			if (*token) {
   216				struct hyp_event *event;
   217				int ret;
   218	
   219				event = find_hyp_event(token);
   220				if (event) {
   221					ret = enable_hyp_event(event, true);
   222					if (ret)
   223						pr_warn("Couldn't enable hyp event %s:%d\n",
   224							token, ret);
   225					else
   226						enabled = true;
   227				} else {
   228					pr_warn("Couldn't find hyp event %s\n", token);
   229				}
   230			}
   231	
   232			if (buf)
   233				*(buf - 1) = ',';
   234		}
   235	
   236		return enabled;
   237	}
   238	

-- 
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https://github.com/intel/lkp-tests