[src/trunk]: src/sys/sys Add brackets arround macro arguments to avoid nasty ...

[tron <tron%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/3ccfb6342401
branches:  trunk
changeset: 773052:3ccfb6342401
user:      tron <tron%NetBSD.org@localhost>
date:      Wed Jan 25 19:47:18 2012 +0000

description:
Add brackets arround macro arguments to avoid nasty problem caused by
macro expansion.

diffstat:

 sys/sys/param.h |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (18 lines):

diff -r 9d32213cd9a1 -r 3ccfb6342401 sys/sys/param.h
--- a/sys/sys/param.h   Wed Jan 25 19:39:07 2012 +0000
+++ b/sys/sys/param.h   Wed Jan 25 19:47:18 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: param.h,v 1.402 2012/01/25 19:39:07 christos Exp $     */
+/*     $NetBSD: param.h,v 1.403 2012/01/25 19:47:18 tron Exp $ */
 
 /*-
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -224,7 +224,7 @@
 #define        STACK_ALLOC(sp, _size)          (((char *)(void *)(sp)) - (_size))
 #define        STACK_MAX(p, _size)             ((char *)(void *)(p))
 #endif
-#define        STACK_LEN_ALIGN(len, bytes)     (((len) + bytes) & ~bytes)
+#define        STACK_LEN_ALIGN(len, bytes)     (((len) + (bytes)) & ~(bytes))
 
 #endif /* defined(_KERNEL) || defined(__EXPOSE_STACK) */