[android-common:android14-kiwi-6.1 216/216] arch/arm64/kvm/hyp_events.c:25:20: warning: no previous prototype for 'hyp_event_trace_host_hcall'

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

Hi Vincent,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android14-kiwi-6.1
head:   2926f30a02021448f3d5484967f2d01a4249e0c7
commit: 508af69a745a81d6fedd161b4d5d614a9d1f9788 [216/216] ANDROID: KVM: arm64: Add EL2 wakeup cause hyp events
config: arm64-randconfig-004-20260816 (https://download.01.org/0day-ci/archive/20260817/202608170540.5ZOV9Mna-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260817/202608170540.5ZOV9Mna-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/202608170540.5ZOV9Mna-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/arm64/kvm/hyp_events.c:25:20: warning: no previous prototype for 'hyp_event_trace_hyp_enter' [-Wmissing-prototypes]
      25 |  enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
         |                    ^~~~~~~~~~~~~~~~
   arch/arm64/include/asm/kvm_hypevents.h:14:1: note: in expansion of macro 'HYP_EVENT'
      14 | HYP_EVENT(hyp_enter,
         | ^~~~~~~~~
   arch/arm64/kvm/hyp_events.c:25:20: warning: no previous prototype for 'hyp_event_trace_hyp_exit' [-Wmissing-prototypes]
      25 |  enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
         |                    ^~~~~~~~~~~~~~~~
   arch/arm64/include/asm/kvm_hypevents.h:23:1: note: in expansion of macro 'HYP_EVENT'
      23 | HYP_EVENT(hyp_exit,
         | ^~~~~~~~~
>> arch/arm64/kvm/hyp_events.c:25:20: warning: no previous prototype for 'hyp_event_trace_host_hcall' [-Wmissing-prototypes]
      25 |  enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
         |                    ^~~~~~~~~~~~~~~~
   arch/arm64/include/asm/kvm_hypevents.h:32:1: note: in expansion of macro 'HYP_EVENT'
      32 | HYP_EVENT(host_hcall,
         | ^~~~~~~~~
>> arch/arm64/kvm/hyp_events.c:25:20: warning: no previous prototype for 'hyp_event_trace_host_smc' [-Wmissing-prototypes]
      25 |  enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
         |                    ^~~~~~~~~~~~~~~~
   arch/arm64/include/asm/kvm_hypevents.h:46:1: note: in expansion of macro 'HYP_EVENT'
      46 | HYP_EVENT(host_smc,
         | ^~~~~~~~~
>> arch/arm64/kvm/hyp_events.c:25:20: warning: no previous prototype for 'hyp_event_trace_host_mem_abort' [-Wmissing-prototypes]
      25 |  enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter, \
         |                    ^~~~~~~~~~~~~~~~
   arch/arm64/include/asm/kvm_hypevents.h:61:1: note: in expansion of macro 'HYP_EVENT'
      61 | HYP_EVENT(host_mem_abort,
         | ^~~~~~~~~
   arch/arm64/kvm/hyp_events.c:249:6: warning: no previous prototype for 'kvm_hyp_events_enable_early' [-Wmissing-prototypes]
     249 | bool kvm_hyp_events_enable_early(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp_events.c:284:6: warning: no previous prototype for 'kvm_hyp_init_events_tracefs' [-Wmissing-prototypes]
     284 | void kvm_hyp_init_events_tracefs(struct dentry *parent)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp_events.c:323:5: warning: no previous prototype for 'kvm_hyp_init_events' [-Wmissing-prototypes]
     323 | int kvm_hyp_init_events(void)
         |     ^~~~~~~~~~~~~~~~~~~


vim +/hyp_event_trace_host_hcall +25 arch/arm64/kvm/hyp_events.c

09014fb1f2df192 Vincent Donnefort 2023-01-26  22  
09014fb1f2df192 Vincent Donnefort 2023-01-26  23  #define HYP_EVENT(__name, __proto, __struct, __assign, __printk)		\
09014fb1f2df192 Vincent Donnefort 2023-01-26  24  	HYP_EVENT_FORMAT(__name, __struct);					\
09014fb1f2df192 Vincent Donnefort 2023-01-26 @25  	enum print_line_t hyp_event_trace_##__name(struct trace_iterator *iter,	\
09014fb1f2df192 Vincent Donnefort 2023-01-26  26  					  int flags, struct trace_event *event) \
09014fb1f2df192 Vincent Donnefort 2023-01-26  27  	{									\
09014fb1f2df192 Vincent Donnefort 2023-01-26  28  		struct ht_iterator *ht_iter = (struct ht_iterator *)iter;	\
09014fb1f2df192 Vincent Donnefort 2023-01-26  29  		struct trace_hyp_format_##__name __maybe_unused *__entry =	\
09014fb1f2df192 Vincent Donnefort 2023-01-26  30  			(struct trace_hyp_format_##__name *)ht_iter->ent;	\
09014fb1f2df192 Vincent Donnefort 2023-01-26  31  		trace_seq_puts(&ht_iter->seq, #__name);				\
09014fb1f2df192 Vincent Donnefort 2023-01-26  32  		trace_seq_putc(&ht_iter->seq, ' ');				\
09014fb1f2df192 Vincent Donnefort 2023-01-26  33  		trace_seq_printf(&ht_iter->seq, __printk);			\
09014fb1f2df192 Vincent Donnefort 2023-01-26  34  		trace_seq_putc(&ht_iter->seq, '\n');				\
09014fb1f2df192 Vincent Donnefort 2023-01-26  35  		return TRACE_TYPE_HANDLED;					\
09014fb1f2df192 Vincent Donnefort 2023-01-26  36  	}
09014fb1f2df192 Vincent Donnefort 2023-01-26  37  #include <asm/kvm_hypevents.h>
09014fb1f2df192 Vincent Donnefort 2023-01-26  38  

:::::: The code at line 25 was first introduced by commit
:::::: 09014fb1f2df192b186cd253fa990925f262f308 ANDROID: KVM: arm64: Add support for nVHE hyp events

:::::: TO: Vincent Donnefort <vdonnefort@google.com>
:::::: CC: Vincent Donnefort <vdonnefort@google.com>

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