Hi Thomas, I can't comment on the objtool stuff as it is a bit outside of my area of expertise (probably going to be my next major learning project) but I can comment on the other errors.
On Thu, Jul 18, 2019 at 10:40:09PM +0200, Thomas Gleixner wrote: > Build fails with: > > clang-10: error: unknown argument: '-mpreferred-stack-boundary=4' > make[5]: *** [linux/scripts/Makefile.build:279: > drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_resource.o] Error 1 Arnd sent a patch for this which has been picked up: https://lore.kernel.org/lkml/CADnq5_Mm=Fj4AkFtuo+W_295q8r6DY3Sumo7gTG-McUYY=c...@mail.gmail.com/ > 3) allmodconfig: > Build fails with: > > ERROR: "__compiletime_assert_2801" > [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined! > ERROR: "__compiletime_assert_2446" > [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined! > ERROR: "__compiletime_assert_2452" > [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined! > ERROR: "__compiletime_assert_2790" > [drivers/net/wireless/intel/iwlwifi/iwlwifi.ko] undefined! Being tracked here: https://github.com/ClangBuiltLinux/linux/issues/580 It is a clang bug but has a kernel side fix. Nick sent one but it sounds like Intel has another one pending: https://lore.kernel.org/lkml/[email protected]/ https://lore.kernel.org/lkml/[email protected]/ > This also emits a boatload of warnings like this: > > linux/fs/nfs/dir.c:451:34: warning: variable 'wq' is uninitialized when > used within its own initialization > [-Wuninitialized] > DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq); > ^~ > linux/include/linux/wait.h:74:63: note: expanded from macro > 'DECLARE_WAIT_QUEUE_HEAD_ONSTACK' > struct wait_queue_head name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) > ~~~~ ^~~~ > linux/include/linux/wait.h:72:33: note: expanded from macro > '__WAIT_QUEUE_HEAD_INIT_ONSTACK' > ({ init_waitqueue_head(&name); name; }) Being tracked here: https://github.com/ClangBuiltLinux/linux/issues/499 Has a kernel workaround patch posted but it should be fixed in clang: https://lore.kernel.org/lkml/[email protected]/ https://bugs.llvm.org/show_bug.cgi?id=42604 Thanks for continuing to test it and keeping us posted on the issues! Nathan
