Re: [PATCH 5.18 000/231] 5.18.13-rc1 review

Greg Kroah-Hartman
2022-07-20T19:46:03Z

On Wed, Jul 20, 2022 at 11:37:01AM -0500, Justin Forbes wrote:
> On Tue, Jul 19, 2022 at 12:32:48PM -0700, Linus Torvalds wrote:
> > On Tue, Jul 19, 2022 at 10:57 AM Naresh Kamboju
> > <naresh.kamboju@linaro.org> wrote:
> > >
> > >
> > > Details log:
> > > ------------
> > > 1. i386 build failures with clang-13 and clang-14
> > > make --silent --keep-going --jobs=8
> > > O=/home/tuxbuild/.cache/tuxmake/builds/1/build LLVM=1 LLVM_IAS=1
> > > ARCH=i386 CROSS_COMPILE=i686-linux-gnu- 'HOSTCC=sccache clang'
> > > 'CC=sccache clang'
> > > ld.lld: error: undefined symbol: __udivdi3
> >
> > Looks like the one introduced by aff1e0b09b54 ("drm/i915/ttm: fix
> > sg_table construction"), and fixed by ced7866db39f ("drm/i915/ttm: fix
> > 32b build").
> >
> > > 2. Large number of build warnings on x86 with gcc-11,
> > > I do not see these build warnings on mainline,
> > ..
> > > 'naked' return found in RETPOLINE build
> >
> > Hmm. Does your cross-compiler support '-mfunction-return=thunk-extern'?
> >
> > Your build does magic things with 'scripts/kconfig/merge_config.sh',
> > and I'm wondering if you perhaps end up enabling CONFIG_RETHUNK with a
> > compiler that doesn't actually support it, or something like that?
>
> I am seeing these 'naked' return found in RETPOLINE build on the
> standard fedora 36 toolchain as well. No cross compiling, nothing fancy.
> These were not seen with mainline, or with the 5.18.12-rc1 retbleed
> patches.

Ok, I think we have a few of the retbleed patches in here that shouldn't
be in there yet. Let me flush them out and then put out a new -rc
tomorrow with this all fixed up. Sasha and I got things crossed, I'll
blame the heat here in Europe and me attempting to take a few days
off...

thanks,

greg k-h