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

[Daniel Díaz]

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@xxxxxxxxxx