iommu: dmar: Provide helper to copy shared irte fields

Instead of open coding, provide a helper function to copy the shared
irte fields.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: jiang.liu@linux.intel.com
Cc: iommu@lists.linux-foundation.org
Cc: joro@8bytes.org
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/1433827237-3382-4-git-send-email-feng.wu@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 0dbcabcb5f0d..e9bc9292bd3a 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -249,6 +249,18 @@ struct irte {
         };
 };
 
+static inline void dmar_copy_shared_irte(struct irte *dst, struct irte *src)
+{
+        dst->present    = src->present;
+        dst->fpd        = src->fpd;
+        dst->avail      = src->avail;
+        dst->pst        = src->pst;
+        dst->vector     = src->vector;
+        dst->sid        = src->sid;
+        dst->sq         = src->sq;
+        dst->svt        = src->svt;
+}
+
 #define PDA_LOW_BIT    26
 #define PDA_HIGH_BIT   32