From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Thu, 22 Nov 2018 09:56:43 +0000 (+0100)
Subject: basic/log: add note about operator precendence
X-Git-Tag: v240~249^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F10871%2Fhead;p=thirdparty%2Fsystemd.git

basic/log: add note about operator precendence
---

diff --git a/src/basic/log.h b/src/basic/log.h
index af01f50952f..17438d7ff7e 100644
--- a/src/basic/log.h
+++ b/src/basic/log.h
@@ -36,6 +36,7 @@ typedef enum LogTarget{
         _LOG_TARGET_INVALID = -1
 } LogTarget;
 
+/* Note to readers: << and >> have lower precedence than & and | */
 #define LOG_REALM_PLUS_LEVEL(realm, level)  ((realm) << 10 | (level))
 #define LOG_REALM_REMOVE_LEVEL(realm_level) ((realm_level) >> 10)
 #define SYNTHETIC_ERRNO(num)                (1 << 30 | (num))