From 7f7210c2102025500a68cfd42f31a4d97e4b0c6f Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 19 Feb 2018 18:37:50 +0100
Subject: [PATCH] io-util: add an unlikely decorator for a test that should
 never hold

---
 src/basic/io-util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/basic/io-util.c b/src/basic/io-util.c
index 08ad42ed952..a6e34cb7625 100644
--- a/src/basic/io-util.c
+++ b/src/basic/io-util.c
@@ -137,7 +137,7 @@ int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
         assert(fd >= 0);
         assert(buf);
 
-        if (nbytes > (size_t) SSIZE_MAX)
+        if (_unlikely_(nbytes > (size_t) SSIZE_MAX))
                 return -EINVAL;
 
         do {