Merge "Fix unnecessary DmaBuffer copying in getIonMappedSizeKb"

am: 0c3db7785a

Change-Id: Id26832bc288f128ab823a60f767f51a632371db2

core/jni/android_os_Debug.cpp

@@ -826,7 +826,7 @@ static jlong android_os_Debug_getIonMappedSizeKb(JNIEnv* env, jobject clazz) {
         }
     }
 
-    for (dmabufinfo::DmaBuffer buf : dmabufs) {
+    for (const dmabufinfo::DmaBuffer& buf : dmabufs) {
         ionPss += buf.size() / 1024;
     }