From 05a65f06f69fa6c487c2933f2971d9ec4e33eb0d Mon Sep 17 00:00:00 2001 From: Russell King Date: Mon, 27 Jul 2015 13:29:57 +0100 Subject: [PATCH] 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: Russell King Signed-off-by: Thierry Reding --- drivers/iommu/tegra-smmu.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 43b69c8cbe46..eb9f6068fe2e 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -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; } -- 2.39.5