diff --git a/compiler-rt/lib/tsan/rtl/tsan_ignoreset.h b/compiler-rt/lib/tsan/rtl/tsan_ignoreset.h
--- a/compiler-rt/lib/tsan/rtl/tsan_ignoreset.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_ignoreset.h
@@ -19,15 +19,14 @@
 
 class IgnoreSet {
  public:
-  static const uptr kMaxSize = 16;
-
   IgnoreSet();
   void Add(StackID stack_id);
-  void Reset();
-  uptr Size() const;
+  void Reset() { size_ = 0; }
+  uptr Size() const { return size_; }
   StackID At(uptr i) const;
 
  private:
+  static constexpr uptr kMaxSize = 16;
   uptr size_;
   StackID stacks_[kMaxSize];
 };
diff --git a/compiler-rt/lib/tsan/rtl/tsan_ignoreset.cpp b/compiler-rt/lib/tsan/rtl/tsan_ignoreset.cpp
--- a/compiler-rt/lib/tsan/rtl/tsan_ignoreset.cpp
+++ b/compiler-rt/lib/tsan/rtl/tsan_ignoreset.cpp
@@ -29,14 +29,6 @@
   stacks_[size_++] = stack_id;
 }
 
-void IgnoreSet::Reset() {
-  size_ = 0;
-}
-
-uptr IgnoreSet::Size() const {
-  return size_;
-}
-
 StackID IgnoreSet::At(uptr i) const {
   CHECK_LT(i, size_);
   CHECK_LE(size_, kMaxSize);