On 9/22/25 9:02 AM, Chen Ridong wrote:
> From: Chen Ridong <chenridong@huawei.com>
>
> If the parent is not a valid partition, an error will be returned before
> any partition update command is processed. This means the
> WARN_ON_ONCE(!is_partition_valid(parent)) can never be triggered, so
> it is safe to remove.
>
> Signed-off-by: Chen Ridong <chenridong@huawei.com>
> ---
> kernel/cgroup/cpuset.c | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
> index 20dface3c3e0..196645b38b24 100644
> --- a/kernel/cgroup/cpuset.c
> +++ b/kernel/cgroup/cpuset.c
> @@ -1923,7 +1923,6 @@ static int update_parent_effective_cpumask(struct cpuset *cs, int cmd,
> * A partition error happens when parent has tasks and all
> * its effective CPUs will have to be distributed out.
> */
> - WARN_ON_ONCE(!is_partition_valid(parent));
> if (nocpu) {
> part_error = PERR_NOCPUS;
> if (is_partition_valid(cs))
Acked-by: Waiman Long <longman@redhat.com>