[android-common:android14-6.1 6546/11052] arch/arm64/kvm/hyp_events.c:204:6: warning: no previous prototype for function 'kvm_hyp_events_enable_early'

[kernel test robot <lkp@intel.com>]

tree:   https://android.googlesource.com/kernel/common android14-6.1
head:   a16d62a2960b9f3c3e809d8051accf68826f3d32
commit: 605d8f6940c38faeaa0aa91a8c793d1d8cd5eab5 [6546/11052] ANDROID: KVM: arm64: add support for early enablement nVHE hyp events
config: arm64-randconfig-r031-20230717 (https://download.01.org/0day-ci/archive/20230718/202307180608.bZ3Ax3CU-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce: (https://download.01.org/0day-ci/archive/20230718/202307180608.bZ3Ax3CU-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307180608.bZ3Ax3CU-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>:72:1: 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>:77:1: 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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