From: Marek Vavruša <marek.vavrusa@nic.cz>
Date: Mon, 29 Jun 2015 23:08:44 +0000 (+0200)
Subject: lib: helping compiler with early returns
X-Git-Tag: v1.0.0-beta1~95^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=87ad66eea0824af26afde2c15a2d288989c908e5;p=thirdparty%2Fknot-resolver.git

lib: helping compiler with early returns
---

diff --git a/lib/defines.h b/lib/defines.h
index 017a14087..9709380c9 100644
--- 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))
 
 /*