[tip:core/iommu] amd-iommu: don't preallocate page tables with CONFIG_IOMMU_STRESS

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Commit-ID:  f5e9705c6429d24dee832b2edd7f4848d432ea03
Gitweb:     http://git.kernel.org/tip/f5e9705c6429d24dee832b2edd7f4848d432ea03
Author:     Joerg Roedel <joerg.roedel@xxxxxxx>
AuthorDate: Fri, 22 May 2009 12:31:53 +0200
Committer:  Joerg Roedel <joerg.roedel@xxxxxxx>
CommitDate: Thu, 28 May 2009 18:18:08 +0200

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@xxxxxxx>


---
 arch/x86/kernel/amd_iommu.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 543822b..33434c4 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;
 
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