Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e7527663 authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Joerg Roedel
Browse files

iommu/exynos: Don't open-code loop unrolling 



IOMMU domain allocation is not performance critical operation, so remove
hand made optimisation of unrolled initialization loop and leave this to
the compiler.

Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 97da3854

drivers/iommu/exynos-iommu.c

+2 −10
Original line number Diff line number Diff line
@@ -741,16 +741,8 @@ static struct iommu_domain *exynos_iommu_domain_alloc(unsigned type) 
		goto err_counter;



	/* Workaround for System MMU v3.3 to prevent caching 1MiB mapping */

	for (i = 0; i < NUM_LV1ENTRIES; i += 8) {

		domain->pgtable[i + 0] = ZERO_LV2LINK;

		domain->pgtable[i + 1] = ZERO_LV2LINK;

		domain->pgtable[i + 2] = ZERO_LV2LINK;

		domain->pgtable[i + 3] = ZERO_LV2LINK;

		domain->pgtable[i + 4] = ZERO_LV2LINK;

		domain->pgtable[i + 5] = ZERO_LV2LINK;

		domain->pgtable[i + 6] = ZERO_LV2LINK;

		domain->pgtable[i + 7] = ZERO_LV2LINK;

	}

	for (i = 0; i < NUM_LV1ENTRIES; i++)

		domain->pgtable[i] = ZERO_LV2LINK;



	handle = dma_map_single(dma_dev, domain->pgtable, LV1TABLE_SIZE,

				DMA_TO_DEVICE);