Comment 1 for bug 2071471

I just had a look at the Ubuntu kernel noble master-next tree and can find commit:
"Revert "s390: update defconfigs"" under the hash b2b97a62f055
and I can see that it got reverted with that:
$ git show b2b97a62f055 | grep CONFIG_IOMMU_DEFAULT_DMA_STRICT
    CONFIG_IOMMU_DEFAULT_DMA_STRICT option needs to be disabled.
-CONFIG_IOMMU_DEFAULT_DMA_STRICT=y
-CONFIG_IOMMU_DEFAULT_DMA_STRICT=y

But git also tells me that it is in since kernel v6.8 and with that since the first ubuntu 6.8 kernel we had: Ubuntu-6.8.0-6 -- so should also be in Ubuntu-6.8.0-31.
But it does not seem to be reflected in the kernel options of the Ubuntu kernel:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04 LTS
Release: 24.04
Codename: noble
$ uname -a
Linux hwe0008 6.8.0-31-generic #31-Ubuntu SMP Sat Apr 20 00:14:26 UTC 2024 s390x s390x s390x GNU/Linux
$ grep CONFIG_IOMMU_DEFAULT_DMA_STRICT /boot/config-6.8.0-31-generic
CONFIG_IOMMU_DEFAULT_DMA_STRICT=y
also not in the current, updated kernel:
Linux hwe0008 6.8.0-36-generic #36-Ubuntu SMP Mon Jun 10 09:59:13 UTC 2024 s390x s390x s390x GNU/Linux
$ grep CONFIG_IOMMU_DEFAULT_DMA_STRICT /boot/config-6.8.0-31-generic
CONFIG_IOMMU_DEFAULT_DMA_STRICT=y
For some reason the change in the upstream commit was not taken over into the Ubuntu kernel configs ...