[PATCH 3/6] VT-d: bring print_qi_regs() in line with print_iommu_regs()

[Jan Beulich <jbeulich@xxxxxxxx>]

Shorten the names printed. There's also no need to go through a local
variable.

While at it also constify the function's parameter.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/drivers/passthrough/vtd/qinval.c
+++ b/xen/drivers/passthrough/vtd/qinval.c
@@ -33,18 +33,11 @@
 
 static int __must_check invalidate_sync(struct vtd_iommu *iommu);
 
-static void print_qi_regs(struct vtd_iommu *iommu)
+static void print_qi_regs(const struct vtd_iommu *iommu)
 {
-    u64 val;
-
-    val = dmar_readq(iommu->reg, DMAR_IQA_REG);
-    printk("DMAR_IQA_REG = %"PRIx64"\n", val);
-
-    val = dmar_readq(iommu->reg, DMAR_IQH_REG);
-    printk("DMAR_IQH_REG = %"PRIx64"\n", val);
-
-    val = dmar_readq(iommu->reg, DMAR_IQT_REG);
-    printk("DMAR_IQT_REG = %"PRIx64"\n", val);
+    printk(" IQA = %"PRIx64"\n", dmar_readq(iommu->reg, DMAR_IQA_REG));
+    printk(" IQH = %"PRIx64"\n", dmar_readq(iommu->reg, DMAR_IQH_REG));
+    printk(" IQT = %"PRIx64"\n", dmar_readq(iommu->reg, DMAR_IQT_REG));
 }
 
 static unsigned int qinval_next_index(struct vtd_iommu *iommu)