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Date: Fri, 11 Jun 2021 11:23:15 -0700 From: Kees Cook <keescook@...omium.org> To: Nick Desaulniers <ndesaulniers@...gle.com> Cc: Nathan Chancellor <nathan@...nel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "tglx@...utronix.de" <tglx@...utronix.de>, Tor Vic <torvic9@...lbox.org>, "mingo@...hat.com" <mingo@...hat.com>, "x86@...nel.org" <x86@...nel.org>, "clang-built-linux@...glegroups.com" <clang-built-linux@...glegroups.com> Subject: Re: [PATCH v2 1/1] x86/Makefile: make -stack-alignment conditional on LLD < 13.0.0 On Thu, Jun 10, 2021 at 04:58:24PM -0700, Nick Desaulniers wrote: > On Thu, Jun 10, 2021 at 4:47 PM Kees Cook <keescook@...omium.org> wrote: > > > > On Thu, Jun 10, 2021 at 03:58:57PM -0700, Nick Desaulniers wrote: > > > On Thu, Jun 10, 2021 at 3:50 PM Kees Cook <keescook@...omium.org> wrote: > > > > > > > > On Thu, 10 Jun 2021 20:58:06 +0000, Tor Vic wrote: > > > > > Since LLVM commit 3787ee4, the '-stack-alignment' flag has been dropped > > > > > [1], leading to the following error message when building a LTO kernel > > > > > with Clang-13 and LLD-13: > > > > > > > > > > ld.lld: error: -plugin-opt=-: ld.lld: Unknown command line argument > > > > > '-stack-alignment=8'. Try 'ld.lld --help' > > > > > ld.lld: Did you mean '--stackrealign=8'? > > > > > > > > > > [...] > > > > > > > > Applied to for-next/clang/features, thanks! > > > > > > > > [1/1] x86/Makefile: make -stack-alignment conditional on LLD < 13.0.0 > > > > https://git.kernel.org/kees/c/e6c00f0b33ad > > > > > > Can we get this into 5.13? > > > > What's the ETA on LLVM 13.0? I was going to put this in -next, marked > > for stable, but we're about 3 weeks from 5.14 merge window. > > Not soon; CI is red over this currently: > mainline: > https://github.com/ClangBuiltLinux/continuous-integration2/runs/2796736763?check_suite_focus=true > https://github.com/ClangBuiltLinux/continuous-integration2/runs/2796736978?check_suite_focus=true > linux-next: > https://github.com/ClangBuiltLinux/continuous-integration2/runs/2791754316?check_suite_focus=true > https://github.com/ClangBuiltLinux/continuous-integration2/runs/2791754426?check_suite_focus=true > https://github.com/ClangBuiltLinux/continuous-integration2/runs/2792796551?check_suite_focus=true > etc Fair enough. Pull request sent to Linus... -- Kees Cook
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