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Commit 05a65f06 authored by Russell King's avatar Russell King Committed by Thierry Reding
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iommu/tegra-smmu: Remove PageReserved manipulation 



Remove the unnecessary manipulation of the PageReserved flags in the
Tegra SMMU driver.  None of this is required as the page(s) remain
private to the SMMU driver.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent e3c97196

drivers/iommu/tegra-smmu.c

+0 −5
Original line number Diff line number Diff line
@@ -293,7 +293,6 @@ static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type) 


	/* clear PDEs */

	pd = page_address(as->pd);

	SetPageReserved(as->pd);



	for (i = 0; i < SMMU_NUM_PDE; i++)

		pd[i] = 0;
@@ -311,7 +310,6 @@ static void tegra_smmu_domain_free(struct iommu_domain *domain) 
	struct tegra_smmu_as *as = to_smmu_as(domain);



	/* TODO: free page directory and page tables */

	ClearPageReserved(as->pd);



	kfree(as);

}
@@ -566,8 +564,6 @@ static u32 *as_get_pte(struct tegra_smmu_as *as, dma_addr_t iova, 


		as->pts[pde] = page;



		SetPageReserved(page);



		pd[pde] = SMMU_MK_PDE(dma, SMMU_PDE_ATTR | SMMU_PDE_NEXT);



		dma_sync_single_range_for_device(smmu->dev, as->pd_dma,
@@ -617,7 +613,6 @@ static void tegra_smmu_pte_put_use(struct tegra_smmu_as *as, unsigned long iova) 


		/* Finally, free the page */

		dma_unmap_page(smmu->dev, pte_dma, SMMU_SIZE_PT, DMA_TO_DEVICE);

		ClearPageReserved(page);

		__free_page(page);

		as->pts[pde] = NULL;

	}