linux-kernel - [PATCH 8/9] fsnotify: use BUILD_BUG_ON() to test the weight of ALL_FSNOTIFY

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Date:	Sat, 16 Mar 2013 00:50:56 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Cc:	Lai Jiangshan <laijs@...fujitsu.com>,
	Eric Paris <eparis@...isplace.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Sasha Levin <sasha.levin@...cle.com>,
	Dan Carpenter <dan.carpenter@...cle.com>
Subject: [PATCH 8/9] fsnotify: use BUILD_BUG_ON() to test the weight of ALL_FSNOTIFY_EVENTS

BUILD_BUG_ON() is build-time-test for constant. avoid runtime test.
also use HWEIGHT32() for build-time.

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
Cc: Eric Paris <eparis@...isplace.org>
---
 fs/notify/fsnotify.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index aba962a..eaa0e9e 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -298,7 +298,7 @@ EXPORT_SYMBOL_GPL(fsnotify);
 
 static __init int fsnotify_init(void)
 {
-	BUG_ON(hweight32(ALL_FSNOTIFY_EVENTS) != 23);
+	BUILD_BUG_ON(HWEIGHT32(ALL_FSNOTIFY_EVENTS) != 23);
 
 	return 0;
 }
-- 
1.7.4.4

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