Re: [PATCH 5.10 000/124] 5.10.178-rc1 review

[Waiman Long]

On 4/18/23 11:08, Naresh Kamboju wrote:
> On Tue, 18 Apr 2023 at 18:03, Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> > This is the start of the stable review cycle for the 5.10.178 release.
> > There are 124 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, 20 Apr 2023 12:02:44 +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-5.10.178-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-5.10.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
> Following build errors noticed on 5.15 and 5.10.,
>
>
> > Waiman Long <longman@xxxxxxxxxx>
> >      cgroup/cpuset: Change references of cpuset_mutex to cpuset_rwsem
> kernel/cgroup/cpuset.c: In function 'cpuset_can_fork':
> kernel/cgroup/cpuset.c:2941:30: error: 'cgroup_mutex' undeclared
> (first use in this function); did you mean 'cgroup_put'?
>   2941 |         lockdep_assert_held(&cgroup_mutex);
>        |                              ^~~~~~~~~~~~
>
> Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
>
> Suspected commit,
> cgroup/cpuset: Add cpuset_can_fork() and cpuset_cancel_fork() methods
> commit eee87853794187f6adbe19533ed79c8b44b36a91 upstream.

Oh, cgroup_mutex needs the recent commit 354ed59744295 ("mm: multi-gen 
LRU: kill switch") to make it available in include/linux/cgroup.h. I did 
my testing with a debug Kconfig and so didn't catch that. This line can 
be safely removed.

Regards,
Longman