From: Xenia Ragiadakou <burzalodowa@gmail.com>
Date: Mon, 22 Aug 2022 10:11:45 +0000 (+0200)
Subject: xen/rbtree: fix MISRA C 2012 Rule 20.7 violation
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=696ee5ca9f4e2256e76056cf72a72001a9748f4c;p=people%2Ftklengyel%2Fxen.git

xen/rbtree: fix MISRA C 2012 Rule 20.7 violation

In macro __rb_parent(), add parentheses around the macro parameter to prevent
against unintended expansions.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
---

diff --git a/xen/lib/rbtree.c b/xen/lib/rbtree.c
index 85a4f20313..eb418baabb 100644
--- a/xen/lib/rbtree.c
+++ b/xen/lib/rbtree.c
@@ -46,7 +46,7 @@
 #define		RB_RED		0
 #define		RB_BLACK	1
 
-#define __rb_parent(pc)    ((struct rb_node *)(pc & ~3))
+#define __rb_parent(pc)    ((struct rb_node *)((pc) & ~3))
 
 #define __rb_color(pc)     ((pc) & 1)
 #define __rb_is_black(pc)  __rb_color(pc)