From: Joerg Roedel <joerg.roedel@amd.com>
Date: Fri, 22 May 2009 10:31:53 +0000 (+0200)
Subject: amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESS
X-Git-Tag: v2.6.31-rc1~408^2~10^4~1
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f5e9705c6429d24dee832b2edd7f4848d432ea03;p=karo-tx-linux.git

amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESS

This forces testing of on-demand page table allocation code.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 543822b39a84..33434c497a6a 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -661,6 +661,10 @@ static int alloc_new_range(struct amd_iommu *iommu,
 	int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT;
 	int i;
 
+#ifdef CONFIG_IOMMU_STRESS
+	populate = false;
+#endif
+
 	if (index >= APERTURE_MAX_RANGES)
 		return -ENOMEM;