AMD IOMMU: replace memset with __GFP_ZERO in alloc_coherent

Remove the memset and use __GFP_ZERO at allocation time instead.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index e486666..f405a61 100644 (file)
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1176,11 +1176,11 @@ static void *alloc_coherent(struct device *dev, size_t size,
        if (!get_device_resources(dev, &iommu, &domain, &devid))
                flag &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
 
+       flag |= __GFP_ZERO;
        virt_addr = (void *)__get_free_pages(flag, get_order(size));
        if (!virt_addr)
                return 0;
 
-       memset(virt_addr, 0, size);
        paddr = virt_to_phys(virt_addr);
 
        if (!iommu || !domain) {