Re: [PATCH 5.4 000/222] 5.4.295-rc1 review

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Jun 25, 2025 at 10:03:22AM +0530, Naresh Kamboju wrote:
> On Tue, 24 Jun 2025 at 15:55, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > On Tue, Jun 24, 2025 at 12:46:15AM +0530, Naresh Kamboju wrote:
> > > On Mon, 23 Jun 2025 at 18:40, Greg Kroah-Hartman
> > > <gregkh@linuxfoundation.org> wrote:
> > > >
> > > > This is the start of the stable review cycle for the 5.4.295 release.
> > > > There are 222 patches in this series, all will be posted as a response
> > > > to this one.  If anyone has any issues with these being applied, please
> > > > let me know.
> > > >
> > > > Responses should be made by Wed, 25 Jun 2025 13:05:50 +0000.
> > > > Anything received after that time might be too late.
> > > >
> > > > The whole patch series can be found in one patch at:
> > > >         https://www.kernel.org/pub/linux/kernel/v5.x/stable-review/patch-5.4.295-rc1.gz
> > > > or in the git tree and branch at:
> > > >         git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.4.y
> > > > and the diffstat can be found below.
> > > >
> > > > thanks,
> > > >
> > > > greg k-h
> > >
> > > Regressions on arm defconfig builds with gcc-12 and clang failed on
> > > the Linux stable-rc 5.4.295-rc1.
> > >
> > > Regressions found on arm
> > > * arm, build
> > >   - clang-20-axm55xx_defconfig
> > >   - clang-20-defconfig
> > >   - clang-20-lkftconfig
> > >   - clang-20-lkftconfig-no-kselftest-frag
> > >   - clang-nightly-axm55xx_defconfig
> > >   - clang-nightly-defconfig
> > >   - clang-nightly-lkftconfig
> > >   - gcc-12-axm55xx_defconfig
> > >   - gcc-12-defconfig
> > >   - gcc-12-lkftconfig
> > >   - gcc-12-lkftconfig-debug
> > >   - gcc-12-lkftconfig-kasan
> > >   - gcc-12-lkftconfig-kunit
> > >   - gcc-12-lkftconfig-libgpiod
> > >   - gcc-12-lkftconfig-no-kselftest-frag
> > >   - gcc-12-lkftconfig-perf
> > >   - gcc-12-lkftconfig-rcutorture
> > >   - gcc-8-axm55xx_defconfig
> > >   - gcc-8-defconfig
> > >
> > > Regression Analysis:
> > >  - New regression? Yes
> > >  - Reproducibility? Yes
> > >
> > > Build regression: stable-rc 5.4.295-rc1 arm kvm init.S Error selected
> > > processor does not support `eret' in ARM mode
> > >
> > > Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> > >
> > >
> > > ## Build errors
> > > arch/arm/kvm/init.S: Assembler messages:
> > > arch/arm/kvm/init.S:109: Error: selected processor does not support
> > > `eret' in ARM mode
> > > arch/arm/kvm/init.S:116: Error: Banked registers are not available
> > > with this architecture. -- `msr ELR_hyp,r1'
> > > arch/arm/kvm/init.S:145: Error: selected processor does not support
> > > `eret' in ARM mode
> > > arch/arm/kvm/init.S:149: Error: selected processor does not support
> > > `eret' in ARM mode
> > > make[2]: *** [scripts/Makefile.build:345: arch/arm/kvm/init.o] Error 1
> > >
> > > and
> > > /tmp/cc0RDxs9.s: Assembler messages:
> > > /tmp/cc0RDxs9.s:45: Error: selected processor does not support `smc
> > > #0' in ARM mode
> > > /tmp/cc0RDxs9.s:94: Error: selected processor does not support `smc
> > > #0' in ARM mode
> > > /tmp/cc0RDxs9.s:160: Error: selected processor does not support `smc
> > > #0' in ARM mode
> > > /tmp/cc0RDxs9.s:296: Error: selected processor does not support `smc
> > > #0' in ARM mode
> > > make[3]: *** [/builds/linux/scripts/Makefile.build:262:
> > > drivers/firmware/qcom_scm-32.o] Error 1
> >
> > That's odd, both clang and gcc don't like this?  Any chance you can do
> > 'git bisect' to track down the offending commit?
> 
> The git bisection pointing to,
> 
>   kbuild: Update assembler calls to use proper flags and language target
>   commit d5c8d6e0fa61401a729e9eb6a9c7077b2d3aebb0 upstream.

Thanks for that,  I'll go drop all of the kbuild patches that Nathan
submitted here and push out a -rc2

greg k-h