diff --git a/compiler-rt/lib/asan/asan_rtl.cpp b/compiler-rt/lib/asan/asan_rtl.cpp
--- a/compiler-rt/lib/asan/asan_rtl.cpp
+++ b/compiler-rt/lib/asan/asan_rtl.cpp
@@ -371,18 +371,10 @@
           kHighShadowBeg > kMidMemEnd);
 }
 
-#if defined(__thumb__) && defined(__linux__)
-#define START_BACKGROUND_THREAD_IN_ASAN_INTERNAL
-#endif
-
-#ifndef START_BACKGROUND_THREAD_IN_ASAN_INTERNAL
 static bool UNUSED __local_asan_dyninit = [] {
   MaybeStartBackgroudThread();
-  SetSoftRssLimitExceededCallback(AsanSoftRssLimitExceededCallback);
-
   return false;
 }();
-#endif
 
 static void AsanInitInternal() {
   if (LIKELY(asan_inited)) return;
@@ -458,10 +450,7 @@
   allocator_options.SetFrom(flags(), common_flags());
   InitializeAllocator(allocator_options);
 
-#ifdef START_BACKGROUND_THREAD_IN_ASAN_INTERNAL
-  MaybeStartBackgroudThread();
   SetSoftRssLimitExceededCallback(AsanSoftRssLimitExceededCallback);
-#endif
 
   // On Linux AsanThread::ThreadStart() calls malloc() that's why asan_inited
   // should be set to 1 prior to initializing the threads.