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authorMarek Szyprowski <m.szyprowski@samsung.com>2017-03-24 12:18:44 +0300
committerJoerg Roedel <jroedel@suse.de>2017-03-24 14:11:43 +0300
commite75276638c1423d286e425fd29375e5736c7635c (patch)
treed007b4495261be5c5fb64389b79db20512d28ba4 /drivers/iommu/exynos-iommu.c
parent97da3854c526d3a6ee05c849c96e48d21527606c (diff)
downloadlinux-e75276638c1423d286e425fd29375e5736c7635c.tar.xz
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: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/exynos-iommu.c')
-rw-r--r--drivers/iommu/exynos-iommu.c12
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index a7e0821c9967..b83df7196e76 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -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);