Re: [PATCH 6.12 000/150] 6.12.18-rc1 review

[Ryan Roberts <ryan.roberts@arm.com>]

On 06/03/2025 12:11, Naresh Kamboju wrote:
> On Wed, 5 Mar 2025 at 23:35, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
>>
>> This is the start of the stable review cycle for the 6.12.18 release.
>> There are 150 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 Fri, 07 Mar 2025 17:44:26 +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/v6.x/stable-review/patch-6.12.18-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-6.12.y
>> and the diffstat can be found below.
>>
>> thanks,
>>
>> greg k-h
> 
> Regressions on arm64 the defconfig builds failed with clang-20 and gcc-13
> the stable-rc 6.12.18-rc1 and 6.13.6-rc1.
> 
> First seen on the 6.12.18-rc1
>  Good: v6.12.14
>  Bad: 6.12.18-rc1
> 
> * arm64, build
>   - clang-20-defconfig
>   - clang-nightly-defconfig
>   - gcc-13-defconfig
>   - gcc-8-defconfig
> 
> Regression Analysis:
>  - New regression? yes
>  - Reproducibility? Yes
> 
> This commmit is causing build regressions,
>   arm64: hugetlb: Fix huge_ptep_get_and_clear() for non-present ptes
>   commit 49c87f7677746f3c5bd16c81b23700bb6b88bfd4 upstream.
> 
> Build regression: arm64 hugetlbpage.c undeclared identifier 'sz'
> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
> 
> ## Build log
> arch/arm64/mm/hugetlbpage.c:386:28: error: use of undeclared identifier 'sz'
>   386 |         ncontig = num_contig_ptes(sz, &pgsize);
>       |                                   ^
> 1 error generated.

This is the same problem we were discussing againt the 6.13 backport. This patch
depends on a patch that conflicted so wasn't auto-backported. I'll send out the
manual backports in due course.

> 
> 
> ## Source
> * Kernel version: 6.12.18-rc1
> * Git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> * Git sha: 43639cc57b2273fce42874dd7f6e0b872f4984c5
> * Git describe: v6.12.15-531-g43639cc57b22
> * Project details:
> https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.15-531-g43639cc57b22
> 
> ## Build
> * Build log: https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.15-531-g43639cc57b22/testrun/27516239/suite/build/test/clang-20-defconfig/log
> * Build history:
> https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.15-531-g43639cc57b22/testrun/27514393/suite/build/test/clang-20-defconfig/history/
> * Build details:
> https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-6.12.y/build/v6.12.15-531-g43639cc57b22/testrun/27516239/suite/build/test/clang-20-defconfig/
> * Build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2tuR9WQOit4WjRC1XVxLJKTcQia/
> * Kernel config:
> https://storage.tuxsuite.com/public/linaro/lkft/builds/2tuR9WQOit4WjRC1XVxLJKTcQia/config
> 
> ## Steps to reproduce
>  - tuxmake --runtime podman --target-arch arm64 --toolchain clang-20
> --kconfig defconfig LLVM=1 LLVM_IAS=1
> 
> 
> --
> Linaro LKFT
> https://lkft.linaro.org