linux-kernel - Re: [PATCH 5.15 000/567] 5.15.99-rc1 review

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Date:   Wed, 8 Mar 2023 00:24:45 -0600
From:   Daniel Díaz <daniel.diaz@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org
Cc:     patches@...ts.linux.dev, linux-kernel@...r.kernel.org,
        torvalds@...ux-foundation.org, 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, peterz@...radead.org,
        jpoimboe@...hat.com
Subject: Re: [PATCH 5.15 000/567] 5.15.99-rc1 review

Hello!

On 07/03/23 10:55, Greg Kroah-Hartman wrote:
> This is the start of the stable review cycle for the 5.15.99 release.
> There are 567 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 Thu, 09 Mar 2023 16:57:34 +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-5.15.99-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-5.15.y
> and the diffstat can be found below.
> 
> thanks,
> 
> greg k-h

A new warning has been introduced on x86_64; we've seen it with GCC 8, 11, 12, and Clang 16.

   arch/x86/kernel/smp.o: warning: objtool: sysvec_reboot()+0x54: unreachable instruction

Bisection pointed towards "x86: Mark stop_this_cpu() __noreturn" (upstream commit f9cdf7ca57cada055f61ef6d0eb4db21c3f200db). Reverting this commit did remove the warning.

Reproducer:

   tuxmake \
     --runtime podman \
     --target-arch x86_64 \
     --toolchain gcc-11 \
     --kconfig https://storage.tuxsuite.com/public/linaro/lkft/builds/2MhGKYH63pYIllJIDAxH3FsvakK/config


Greetings!

Daniel Díaz
daniel.diaz@...aro.org