On Fri, 4 Dec 2020 21:00:00 +1100 Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> wrote: > Hi all, > > After merging the akpm tree, today's linux-next build (powerpc > allyesconfig) produced warnings like this: > > kernel/kcov.c:296:14: warning: conflicting types for built-in function '__sanitizer_cov_trace_switch'; expected 'void(long unsigned int, void *)' [-Wbuiltin-declaration-mismatch] > 296 | void notrace __sanitizer_cov_trace_switch(u64 val, u64 *cases) > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ Odd. clang wants that signature, according to https://clang.llvm.org/docs/SanitizerCoverage.html. But gcc seems to want a different signature. Beats me - best I can do is to cc various likely culprits ;) Which gcc version? Did you recently update gcc? > ld: warning: orphan section `.data..Lubsan_data177' from `arch/powerpc/oprofile/op_model_pa6t.o' being placed in section `.data..Lubsan_data177' > > (lots of these latter ones) > > I don't know what produced these, but it is in the akpm-current or > akpm trees.
