From 50bdff1a4ffe29d6703d51b870c1e1d9fd0f90ae Mon Sep 17 00:00:00 2001
From: Stefan Lankes <slankes@eonerc.rwth-aachen.de>
Date: Sun, 19 Jul 2015 11:04:06 +0200
Subject: [PATCH] minor improvement by using builtin_expect

---
 hermit/libkern/stdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hermit/libkern/stdio.c b/hermit/libkern/stdio.c
index 89119f8db..20b5d2fcf 100644
--- a/hermit/libkern/stdio.c
+++ b/hermit/libkern/stdio.c
@@ -67,7 +67,7 @@ int kputchar(int c)
 	int pos;
 
 	/* add place holder for end of string */
-	if (!c)
+	if (BUILTIN_EXPECT(!c, 0))
 		c = '?';
 
 	if (early_print != NO_EARLY_PRINT)