diff --git a/js/src/vm/Stopwatch.cpp b/js/src/vm/Stopwatch.cpp
index 7c6c9e0f0268..989a08b0554a 100644
--- a/js/src/vm/Stopwatch.cpp
+++ b/js/src/vm/Stopwatch.cpp
@@ -417,11 +417,9 @@ AutoStopwatch::getCPU() const
 
     cpuid_t result(proc.Group, proc.Number);
     return result;
-#elif defined(__GLIBC__)
-    return sched_getcpu();
 #else
     return {};
-#endif // defined(XP_WIN) || defined(__GLIBC__)
+#endif // defined(XP_WIN)
 }
 
 bool inline
@@ -429,8 +427,6 @@ AutoStopwatch::isSameCPU(const cpuid_t& a, const cpuid_t& b) const
 {
 #if defined(XP_WIN)  && WINVER >= _WIN32_WINNT_VISTA
     return a.group_ == b.group_ && a.number_ == b.number_;
-#elif defined(__GLIBC__)
-    return a == b;
 #else
     return true;
 #endif
diff --git a/js/src/vm/Stopwatch.h b/js/src/vm/Stopwatch.h
index 0cfb453c4bf2..ad8322b32647 100644
--- a/js/src/vm/Stopwatch.h
+++ b/js/src/vm/Stopwatch.h
@@ -314,11 +314,9 @@ struct cpuid_t {
           number_(0)
     { }
 };
-#elif defined(__linux__)
-    typedef int cpuid_t;
 #else
     typedef struct {} cpuid_t;
-#endif // defined(WINVER >= 0x0600) || defined(__linux__)
+#endif // defined(WINVER >= 0x0600)
 
 /**
  * RAII class to start/stop measuring performance when