: 8e929cb546ee42c9a61d24fae60605e9e3192354
patch link:
https://lore.kernel.org/r/2-v3-b3a5b5937f56%2B7bb-arm_no_split_jgg%40nvidia.com
patch subject: [PATCH v3 2/3] iommu/io-pgtable-arm-v7s: Remove split on unmap
behavior
config: arm-randconfig-004-20241106
(https://download.01.org/0day-ci/archive/20241106
A minority of page table implementations (arm_lpae, armv7) are unique in
how they handle partial unmap of large IOPTEs.
Other implementations will unmap the large IOPTE and return it's
length. For example if a 2M IOPTE is present and the first 4K is requested
to be unmapped then unmap will remove
