[Xen-devel] [PATCH v12 4/7] VT-d: Some cleanups

[Chao Gao <chao.gao@xxxxxxxxx>]

From: Feng Wu <feng.wu@xxxxxxxxx>

Use type-safe structure assignment instead of memcpy()
Use sizeof(*iremap_entry).

Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
---
v10:
- Added several lines for patch [1/6] has been reworked.

v9:
- Delete several lines for patch [5/8] has been reworked.

v7: 
- Remove a useless cleanup

v6: 
- More descripion about the patch

 xen/drivers/passthrough/vtd/intremap.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/xen/drivers/passthrough/vtd/intremap.c 
b/xen/drivers/passthrough/vtd/intremap.c
index 6314cbf..a18717b 100644
--- a/xen/drivers/passthrough/vtd/intremap.c
+++ b/xen/drivers/passthrough/vtd/intremap.c
@@ -183,8 +183,8 @@ static void free_remap_entry(struct iommu *iommu, int index)
     GET_IREMAP_ENTRY(ir_ctrl->iremap_maddr, index,
                      iremap_entries, iremap_entry);
 
-    memset(iremap_entry, 0, sizeof(struct iremap_entry));
-    iommu_flush_cache_entry(iremap_entry, sizeof(struct iremap_entry));
+    memset(iremap_entry, 0, sizeof(*iremap_entry));
+    iommu_flush_cache_entry(iremap_entry, sizeof(*iremap_entry));
     iommu_flush_iec_index(iommu, 0, index);
 
     unmap_vtd_domain_page(iremap_entries);
@@ -310,7 +310,7 @@ static int ioapic_rte_to_remap_entry(struct iommu *iommu,
     GET_IREMAP_ENTRY(ir_ctrl->iremap_maddr, index,
                      iremap_entries, iremap_entry);
 
-    memcpy(&new_ire, iremap_entry, sizeof(struct iremap_entry));
+    new_ire = *iremap_entry;
 
     if ( rte_upper )
     {
@@ -353,8 +353,8 @@ static int ioapic_rte_to_remap_entry(struct iommu *iommu,
         remap_rte->format = 1;    /* indicate remap format */
     }
 
-    memcpy(iremap_entry, &new_ire, sizeof(struct iremap_entry));
-    iommu_flush_cache_entry(iremap_entry, sizeof(struct iremap_entry));
+    *iremap_entry = new_ire;
+    iommu_flush_cache_entry(iremap_entry, sizeof(*iremap_entry));
     iommu_flush_iec_index(iommu, 0, index);
 
     unmap_vtd_domain_page(iremap_entries);
@@ -639,8 +639,8 @@ static int msi_msg_to_remap_entry(
     remap_rte->address_hi = 0;
     remap_rte->data = index - i;
 
-    memcpy(iremap_entry, &new_ire, sizeof(struct iremap_entry));
-    iommu_flush_cache_entry(iremap_entry, sizeof(struct iremap_entry));
+    *iremap_entry = new_ire;
+    iommu_flush_cache_entry(iremap_entry, sizeof(*iremap_entry));
     iommu_flush_iec_index(iommu, 0, index);
 
     unmap_vtd_domain_page(iremap_entries);
-- 
1.8.3.1


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