diff --git a/services/surfaceflinger/clz.h b/services/surfaceflinger/clz.h
index 0ddf986..ca44555 100644
--- a/services/surfaceflinger/clz.h
+++ b/services/surfaceflinger/clz.h
@@ -20,18 +20,10 @@
 
 namespace android {
 
-int clz_impl(int32_t x);
-
-int inline clz(int32_t x)
-{
-#if defined(__arm__) && !defined(__thumb__)
+int inline clz(int32_t x) {
     return __builtin_clz(x);
-#else
-    return clz_impl(x);
-#endif
 }
 
-
 }; // namespace android
 
 #endif /* ANDROID_SURFACE_FLINGER_CLZ_H */