lib: helping compiler with early returns

diff --git a/lib/defines.h b/lib/defines.h
index 017a14087e935188514c59408b04429dc92514ef..9709380c9d164c07828ad38fe3fb0f6b4b7ebef5 100644 (file)
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -25,7 +25,10 @@
  * Error codes.
  */
 #define kr_ok() 0
-#define kr_error(x) -abs(x)
+/* Mark as cold to mark all branches as unlikely. */
+static inline int __attribute__((__cold__)) kr_error(int x) {
+       return -abs(x);
+}
 #define kr_strerror(x) strerror(abs(x))
 
 /*