RE: [PATCH rc] iommufd: Explicitize struct iommu_hwpt_pgfault padding

[Tian, Kevin]

> From: Nicolin Chen <nicolinc@xxxxxxxxxx>
> Sent: Saturday, January 18, 2025 10:37 AM
> 
> @@ -868,6 +868,7 @@ enum iommu_hwpt_pgfault_perm {
>   * @pasid: Process Address Space ID
>   * @grpid: Page Request Group Index
>   * @perm: Combination of enum iommu_hwpt_pgfault_perm
> + * @__reserved: Must be 0.

iommufd_fault_fops_read() doesn't follow this statement as
hwpt_fault is on stack with that field uninitialized.