On Mon, 10 Dec 2018, Robin Murphy wrote:
> dma-debug is now capable of adding new entries to its pool on-demand if
> the initial preallocation was insufficient, so the IOMMU_LEAK logic no
> longer needs to explicitly change the pool size. This does lose it the
> ability to save a couple of megabytes of RAM by reducing the pool size
> below its default, but it seems unlikely that that is a realistic
> concern these days (or indeed that anyone is actively debugging AGP
> drivers' DMA usage any more). Getting rid of dma_debug_resize_entries()
> will make room for further streamlining in the dma-debug code itself.
>
> Removing the call reveals quite a lot of cruft which has been useless
> for nearly a decade since commit 19c1a6f5764d ("x86 gart: reimplement
> IOMMU_LEAK feature by using DMA_API_DEBUG"), including the entire
> 'iommu=leak' parameter, which controlled nothing except whether
> dma_debug_resize_entries() was called or not.
>
> CC: Thomas Gleixner <t...@linutronix.de>
> CC: Ingo Molnar <mi...@redhat.com>
> CC: Borislav Petkov <b...@alien8.de>
> CC: "H. Peter Anvin" <h...@zytor.com>
> CC: x...@kernel.org
> Reviewed-by: Christoph Hellwig <h...@lst.de>
> Signed-off-by: Robin Murphy <robin.mur...@arm.com>
Acked-by: Thomas Gleixner <t...@linutronix.de>
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