Re: [PATCH v10 0/8] iommu/arm-smmu-v3: Introduce an RCU-protected invalidation array

[Will Deacon]

On Mon, Jan 26, 2026 at 07:09:11PM -0800, Nicolin Chen wrote:
> Changelog
> v10:
>  * Rebase on arm/smmu/updates
>  * Add Reviewed-by from Pranjal
>  * Fix typo in kdoc and update comments
>  * Add dma_wmb() in arm_smmu_write_entry()
>  * Drop free_fn from arm_smmu_invs_unref()
>  * Replace refcount_t users with WRITE_ONCE/READ_ONCE()
>  * Verify num_trashes in arm_smmu_v3_invs_test_verify()

I think it probably just slipped through the cracks, but Pranjal had a
concern in v9 about the rwlock not being irqsafe:

https://lore.kernel.org/r/aXND9YJTwm6om689@xxxxxxxxxx

Did that get discussed someplace that I missed?

Will