SWDEV-292408 - Keep tracking of subbuffers for multiple devices

Change-Id: I568b5ea79614ef507cf1f0efb3dca38ab6cc2db7

rocclr/platform/memory.cpp

@@ -457,12 +457,11 @@ bool Memory::setDestructorCallback(DestructorCallBackFunction callback, void* da
 }
 
 void Memory::signalWrite(const Device* writer) {
-  // Disable cache coherency layer for HIP
-  if (!amd::IS_HIP) {
-    // (the potential race condition below doesn't matter, no critical
-    // section needed)
-    ++version_;
-    lastWriter_ = writer;
+  // The potential race condition below doesn't matter, no critical section needed
+  ++version_;
+  lastWriter_ = writer;
+  // Keep subbuffers tracking only for multiple devices and it's not system memory
+  if ((numDevices() > 1) && (nullptr == getHostMem())) {
     // Update all subbuffers for this object
     for (auto buf : subBuffers_) {
       buf->signalWrite(writer);