Apply preempt_rt patch-4.9-rt1.patch.xz

[zynq/linux.git] / drivers / iommu / intel-iommu.c

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index d8376c2d18b3bf7491cb80473053b1a34f6cd54f..44b6f826c2034698c9d1bbc035eceee9a0957a97 100644 (file)
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -479,7 +479,7 @@ struct deferred_flush_data {
        struct deferred_flush_table *tables;
 };
 
-DEFINE_PER_CPU(struct deferred_flush_data, deferred_flush);
+static DEFINE_PER_CPU(struct deferred_flush_data, deferred_flush);
 
 /* bitmap for indexing intel_iommus */
 static int g_num_of_iommus;
@@ -3696,10 +3696,8 @@ static void add_unmap(struct dmar_domain *dom, unsigned long iova_pfn,
        struct intel_iommu *iommu;
        struct deferred_flush_entry *entry;
        struct deferred_flush_data *flush_data;
-       unsigned int cpuid;
 
-       cpuid = get_cpu();
-       flush_data = per_cpu_ptr(&deferred_flush, cpuid);
+       flush_data = raw_cpu_ptr(&deferred_flush);
 
        /* Flush all CPUs' entries to avoid deferring too much.  If
         * this becomes a bottleneck, can just flush us, and rely on
@@ -3732,8 +3730,6 @@ static void add_unmap(struct dmar_domain *dom, unsigned long iova_pfn,
        }
        flush_data->size++;
        spin_unlock_irqrestore(&flush_data->lock, flags);
-
-       put_cpu();
 }
 
 static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size)