From: Brian Behlendorf <behlendorf1@llnl.gov>
Date: Tue, 10 Oct 2017 15:59:17 +0000 (-0700)
Subject: Add parenthesis to btop and ptob macros
X-Git-Tag: zfs-0.8.0-rc1~152^2~21
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0cefc9dbcd9de8a35c51e172edabf2f2ecf15f92;p=zfs

Add parenthesis to btop and ptob macros

Add missing parenthesis around btop and ptob macros to ensure
operation ordering is preserved after expansion.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #660
---

diff --git a/include/sys/param.h b/include/sys/param.h
index 2c9fcd8e9..10bf96588 100644
--- a/include/sys/param.h
+++ b/include/sys/param.h
@@ -28,8 +28,8 @@
 #include <asm/page.h>
 
 /* Pages to bytes and back */
-#define ptob(pages)			(pages << PAGE_SHIFT)
-#define btop(bytes)			(bytes >> PAGE_SHIFT)
+#define ptob(pages)			((pages) << PAGE_SHIFT)
+#define btop(bytes)			((bytes) >> PAGE_SHIFT)
 
 #define MAXUID				UINT32_MAX