On Thu, Mar 16, 2017 at 12:46 AM, Ingo Molnar <mi...@kernel.org> wrote: > > I don't think we want to add such ugly workarounds for clang bugs in a > piecemail > wise manner. If this was the _only_ workaround required to have a working > kernel > built with clang then maybe, but there's no way to tell from this submission. > Apologies for the lack of context. This change, and the #undef of mem* in x86/boot/string.c are actually the only patches that are absolutely needed to get an x86_64 kernel to build and boot successfully with clang provided that you also arrange for clang be invoked with the -no-integrated-as option. In practice it is also necessary to disable a few more clang warnings to make the build tolerable.
I will send out a more complete set of patches later today which deal with those other issues. As far as the specific issue of this particular clang bug is concerned I did also consider adding a configuration option to simply not build the real mode boot code at all but that looked like it would require much more extensive surgery.
