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

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Message-ID: <2025062425-waggle-jaybird-ef83@gregkh>
Date: Tue, 24 Jun 2025 11:25:49 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Naresh Kamboju <naresh.kamboju@...aro.org>
Cc: stable@...r.kernel.org, patches@...ts.linux.dev,
	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	kvmarm@...ts.cs.columbia.edu, akpm@...ux-foundation.org,
	linux@...ck-us.net, shuah@...nel.org, patches@...nelci.org,
	lkft-triage@...ts.linaro.org, pavel@...x.de, jonathanh@...dia.com,
	f.fainelli@...il.com, sudipm.mukherjee@...il.com,
	srw@...dewatkins.net, rwarsow@....de, conor@...nel.org,
	hargar@...rosoft.com, broonie@...nel.org,
	Marc Zyngier <maz@...nel.org>, James Morse <james.morse@....com>,
	Julien Thierry <julien.thierry.kdev@...il.com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Russell King <linux@...linux.org.uk>,
	Linux ARM <linux-arm-kernel@...ts.infradead.org>,
	Andy Gross <agross@...nel.org>
Subject: Re: [PATCH 5.4 000/222] 5.4.295-rc1 review

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@...uxfoundation.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@...aro.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?

thanks,

greg k-h