Index: lib/Target/AMDGPU/AMDGPUPTNote.h
===================================================================
--- lib/Target/AMDGPU/AMDGPUPTNote.h
+++ lib/Target/AMDGPU/AMDGPUPTNote.h
@@ -19,7 +19,7 @@
 
 namespace AMDGPU {
 
-namespace PT_NOTE {
+namespace AMD_PT_NOTE {
 
 const char SectionName[] = ".note";
 
Index: lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.h
===================================================================
--- lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.h
+++ lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.h
@@ -85,7 +85,7 @@
 class AMDGPUTargetELFStreamer : public AMDGPUTargetStreamer {
   MCStreamer &Streamer;
 
-  void EmitAMDGPUNote(const MCExpr *DescSize, AMDGPU::PT_NOTE::NoteType Type,
+  void EmitAMDGPUNote(const MCExpr *DescSize, AMDGPU::AMD_PT_NOTE::NoteType Type,
                       function_ref<void(MCELFStreamer &)> EmitDesc);
 
 public:
Index: lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
===================================================================
--- lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
+++ lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
@@ -125,20 +125,20 @@
 }
 
 void AMDGPUTargetELFStreamer::EmitAMDGPUNote(
-    const MCExpr *DescSZ, PT_NOTE::NoteType Type,
+    const MCExpr *DescSZ, AMD_PT_NOTE::NoteType Type,
     function_ref<void(MCELFStreamer &)> EmitDesc) {
   auto &S = getStreamer();
   auto &Context = S.getContext();
 
-  auto NameSZ = sizeof(PT_NOTE::NoteName);
+  auto NameSZ = sizeof(AMD_PT_NOTE::NoteName);
 
   S.PushSection();
   S.SwitchSection(Context.getELFSection(
-    PT_NOTE::SectionName, ELF::SHT_NOTE, ELF::SHF_ALLOC));
+    AMD_PT_NOTE::SectionName, ELF::SHT_NOTE, ELF::SHF_ALLOC));
   S.EmitIntValue(NameSZ, 4);                                  // namesz
   S.EmitValue(DescSZ, 4);                                     // descz
   S.EmitIntValue(Type, 4); // type
-  S.EmitBytes(StringRef(PT_NOTE::NoteName, NameSZ));          // name
+  S.EmitBytes(StringRef(AMD_PT_NOTE::NoteName, NameSZ));      // name
   S.EmitValueToAlignment(4, 0, 1, 0);                         // padding 0
   EmitDesc(S);                                                // desc
   S.EmitValueToAlignment(4, 0, 1, 0);                         // padding 0
@@ -151,7 +151,7 @@
 
   EmitAMDGPUNote(
     MCConstantExpr::create(8, getContext()),
-    PT_NOTE::NT_AMDGPU_HSA_CODE_OBJECT_VERSION,
+    AMD_PT_NOTE::NT_AMDGPU_HSA_CODE_OBJECT_VERSION,
     [&](MCELFStreamer &OS){
       OS.EmitIntValue(Major, 4);
       OS.EmitIntValue(Minor, 4);
@@ -174,7 +174,7 @@
 
   EmitAMDGPUNote(
     MCConstantExpr::create(DescSZ, getContext()),
-    PT_NOTE::NT_AMDGPU_HSA_ISA,
+    AMD_PT_NOTE::NT_AMDGPU_HSA_ISA,
     [&](MCELFStreamer &OS) {
       OS.EmitIntValue(VendorNameSize, 2);
       OS.EmitIntValue(ArchNameSize, 2);
@@ -240,7 +240,7 @@
 
   EmitAMDGPUNote(
     DescSZ,
-    PT_NOTE::NT_AMDGPU_HSA_RUNTIME_METADATA,
+    AMD_PT_NOTE::NT_AMDGPU_HSA_RUNTIME_METADATA,
     [&](MCELFStreamer &OS) {
       OS.EmitLabel(DescBegin);
       OS.EmitBytes(VerifiedMetadata.get());