compared to 4.19.28 the new release doesnt compile due to warnings.


...
tatement -Wno-pointer-sign -fno-strict-overflow -fno-merge-all-constants 
-fmerge-constants -fno-stack-check -fconserve-stack -Werror=implicit-int
 -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types 
-Werror=designated-init    -DKBUILD_BASENAME='"core"' -DKBUILD_MODNAME='"core"'
 -c -o arch/x86/events/core.o arch/x86/events/core.c

In file included from arch/x86/events/core.c:44:0:
arch/x86/events/perf_event.h:1033:45: warning: ‘struct cpu_hw_event’ declaredinside parameter list will not be visible outside of this definition or declaration
 static inline int intel_cpuc_prepare(struct cpu_hw_event *cpuc, int cpu)
                                             ^~~~~~~~~~~~
arch/x86/events/perf_event.h:1038:45: warning: ‘struct cpu_hw_event’ declared inside parameter list will not be visible outside of this definition or declaration
 static inline void intel_cpuc_finish(struct cpu_hw_event *cpuc)
                                             ^~~~~~~~~~~~
arch/x86/events/core.c: In function ‘free_fake_cpuc’:
arch/x86/events/core.c:1973:20: error: passing argument 1 of ‘intel_cpuc_finish’ from incompatible pointer type [-Werror=incompatible-pointer-types]
  intel_cpuc_finish(cpuc);
                    ^~~~
In file included from arch/x86/events/core.c:44:0:
arch/x86/events/perf_event.h:1038:20: note: expected ‘struct cpu_hw_event *’ but argument is of type ‘struct cpu_hw_events *’
 static inline void intel_cpuc_finish(struct cpu_hw_event *cpuc)
                    ^~~~~~~~~~~~~~~~~
arch/x86/events/core.c: In function ‘allocate_fake_cpuc’:
arch/x86/events/core.c:1987:25: error: passing argument 1 of ‘intel_cpuc_prepare’ from incompatible pointer type [-Werror=incompatible-pointer-types]
  if (intel_cpuc_prepare(cpuc, cpu))
                         ^~~~
In file included from arch/x86/events/core.c:44:0:
arch/x86/events/perf_event.h:1033:19: note: expected ‘struct cpu_hw_event *’ but argument is of type ‘struct cpu_hw_events *’
 static inline int intel_cpuc_prepare(struct cpu_hw_event *cpuc, int cpu)
                   ^~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:304: arch/x86/events/core.o] Error 1
make[1]: *** [scripts/Makefile.build:544: arch/x86/events] Error 2
make: *** [Makefile:1047: arch/x86] Error 2
...


using identical .config and compiler (gcc-7.4.0) 
I suppose I could make it compile but I think somebody more
familiar with the code could fix it properly.
let me know if you need the .config or additional info


Michael