On Tue, 2019-09-24 at 21:07 +0900, Masahiro Yamada wrote: > Johannes Berg reports lots of modpost warnings on ARCH=um builds: > > WARNING: "rename" [vmlinux] is a static EXPORT_SYMBOL > [snip] > WARNING: "__stack_smash_handler" [vmlinux] is a static EXPORT_SYMBOL > > When you run "make", the modpost is run twice; before linking vmlinux, > and before building modules. All the warnings above are from the second > modpost. > > The offending symbols are defined not in vmlinux, but in the C library. > The first modpost is run against the relocatable vmlinux.o, and those > warnings are nicely suppressed because the SH_UNDEF entries from the > symbol table clear the ->is_static flag. > > The second modpost is run against the executable vmlinux (+ modules), > where those symbols have been resolved, but the definitions do not > exist. > > This commit fixes it in a straight forward way. Suppress the static > EXPORT_SYMBOL warnings from "vmlinux". Yep, that fixes it. Tested-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> Thanks! johannes
