On Wed, Oct 17, 2018 at 12:25 AM Jani Nikula <jani.nikula@xxxxxxxxx> wrote: > > On Tue, 16 Oct 2018, Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote: > > On Tue, Oct 16, 2018 at 8:35 AM Stephen Boyd <swboyd@xxxxxxxxxxxx> wrote: > >> > >> Quoting Jani Nikula (2018-10-16 05:29:38) > >> > Clang build with UBSAN enabled leads to the following build error: > > > > I'm overjoyed that you're testing this configuration! If you find more > > bugs, we're happy to help triage if you let us know about them here: > > https://github.com/ClangBuiltLinux/linux/issues. > > Everyone, thanks for the patches/reports, reviews, and testing! These > two have now been pushed to drm-intel-next-queued; due to timing they're > expected to land upstream in the merge window for v4.21 i.e. not the > imminent one. (So much for the quick turnaround! ;) > > Also glad to connect you all here. :) > > So I don't mind making small concessions to Clang build such as these in > the interest of gaining better static analysis. Our (i915) own pre-merge > build testing uses primarily gcc and sparse, with a bunch of extra flags > (see the top of drivers/gpu/drm/i915/Makefile), but I'm not sure about > adding Clang to the mix anytime soon. Without a tight and constant > feedback loop new issues will pop up though. Maybe we'll spot inline > function use in constant expressions in review, maybe we don't. I'm sure > there are other Clang specific issues. > > Do you have any plans for setting up something like the 0day? Without > the feedback loop I think you'll take one step back for every two steps > you progress... Yes, I was in contact with Intel's 0day folks (out of Shanghai, I believe). Unfortunately, the patch requiring asm-goto landed just as they started looking into supporting clang which really really derailed things. See http://lkml.iu.edu/hypermail/linux/kernel/1804.0/00720.html where no one working on Clang was CC'ed about this. In the meantime, we've been focusing on arm64 and kernel-ci with Linaro. More on that soon. > > BR, > Jani. > > -- > Jani Nikula, Intel Open Source Graphics Center -- Thanks, ~Nick Desaulniers _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
