Re: linux-next: build failure while building Linus' tree

From: Nick Desaulniers
Date: Thu Sep 09 2021 - 18:50:40 EST

+ Rasmus

This was introduced in
commit f0907827a8a91 ("compiler.h: enable builtin overflow checkers and add
fallback code")
which added division using the `/` operator, which is problematic when checking
for overflows of 64b operands on 32b targets.

We'll probably need helpers from linux/math64.h and some combination of

That will help us fix another compiler bug for older clang releases, too.