diff --git a/llvm/include/llvm/CodeGen/MultiHazardRecognizer.h b/llvm/include/llvm/CodeGen/MultiHazardRecognizer.h
index be35be5680c217..9846045ff014bb 100644
--- a/llvm/include/llvm/CodeGen/MultiHazardRecognizer.h
+++ b/llvm/include/llvm/CodeGen/MultiHazardRecognizer.h
@@ -30,7 +30,7 @@ class MultiHazardRecognizer : public ScheduleHazardRecognizer {
   void AddHazardRecognizer(std::unique_ptr<ScheduleHazardRecognizer> &&);
 
   bool atIssueLimit() const override;
-  HazardType getHazardType(SUnit *m, int Stalls = 0) override;
+  HazardType getHazardType(SUnit *, int Stalls = 0) override;
   void Reset() override;
   void EmitInstruction(SUnit *) override;
   void EmitInstruction(MachineInstr *) override;
diff --git a/llvm/include/llvm/CodeGen/ScheduleHazardRecognizer.h b/llvm/include/llvm/CodeGen/ScheduleHazardRecognizer.h
index 53c5fc0edee5bc..9f1101b658d048 100644
--- a/llvm/include/llvm/CodeGen/ScheduleHazardRecognizer.h
+++ b/llvm/include/llvm/CodeGen/ScheduleHazardRecognizer.h
@@ -57,7 +57,7 @@ class ScheduleHazardRecognizer {
   ///     other instruction is available, issue it first.
   ///  * NoopHazard: issuing this instruction would break the program.  If
   ///     some other instruction can be issued, do so, otherwise issue a noop.
-  virtual HazardType getHazardType(SUnit *m, int Stalls = 0) {
+  virtual HazardType getHazardType(SUnit *, int Stalls = 0) {
     return NoHazard;
   }
 
diff --git a/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp b/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp
index e2af0222799919..35bd16d8def139 100644
--- a/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.cpp
@@ -74,8 +74,8 @@ unsigned SystemZHazardRecognizer::getCurrCycleIdx(SUnit *SU) const {
 }
 
 ScheduleHazardRecognizer::HazardType SystemZHazardRecognizer::
-getHazardType(SUnit *m, int Stalls) {
-  return (fitsIntoCurrentGroup(m) ? NoHazard : Hazard);
+getHazardType(SUnit *SU, int Stalls) {
+  return (fitsIntoCurrentGroup(SU) ? NoHazard : Hazard);
 }
 
 void SystemZHazardRecognizer::Reset() {
diff --git a/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.h b/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.h
index 38bf41ebe96a13..b2ee64a1bb4a26 100644
--- a/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.h
+++ b/llvm/lib/Target/SystemZ/SystemZHazardRecognizer.h
@@ -113,7 +113,7 @@ class SystemZHazardRecognizer : public ScheduleHazardRecognizer {
     Reset();
   }
 
-  HazardType getHazardType(SUnit *m, int Stalls = 0) override;
+  HazardType getHazardType(SUnit *SU, int Stalls = 0) override;
   void Reset() override;
   void EmitInstruction(SUnit *SU) override;