On Tue, 13 Jul 2021 at 17:18, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Tue, Jul 13, 2021 at 08:40:28PM +0530, Naresh Kamboju wrote: > > LKFT have noticed these warnings / errors when we have updated gcc version from > > gcc-9 to gcc-11 on stable-rc linux-5.4.y branch. I have provided the steps to > > reproduce in this email below. > > > > Following perf builds failed with gcc-11 with linux-5.4.y branch. > > - build-arm-gcc-11-perf > > - build-arm64-gcc-11-perf > > - build-i386-gcc-11-perf > > - build-x86-gcc-11-perf > > > > Build error log: > > -------------------- > > <snip> > > I imagine this is fixed in newer kernel versions, so if you could > provide the git ids of the patches needed to fix this up in 5.4, that > would be great! You were correct, I did a bisect [1] and found d493720581a6 ("perf bench: Fix 2 memory sanitizer warnings"). commit d2c73501a767514b6c85c7feff9457a165d51057 upstream. Cherry picked it and I was able to build it on arm64 and x86. Cheers, Anders [1] http://ix.io/3sS6