linux-kernel - [PATCH 6/7 V3] idr: reduce the unneeded check in free

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Message-ID: <1398147810-26414-7-git-send-email-laijs@cn.fujitsu.com>
Date:	Tue, 22 Apr 2014 14:23:28 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	<linux-kernel@...r.kernel.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Jean Delvare <jdelvare@...e.de>,
	Monam Agarwal <monamagarwal123@...il.com>,
	Jeff Layton <jlayton@...hat.com>,
	Andreas Gruenbacher <agruen@...bit.com>,
	Stephen Hemminger <stephen@...workplumber.org>
Subject: [PATCH 6/7 V3] idr: reduce the unneeded check in free_layer()

If "idr->hint == p" is true, it also implies "idr->hint" is true(not NULL).

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
Acked-by: Tejun Heo <tj@...nel.org>
---
 lib/idr.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/idr.c b/lib/idr.c
index 9ed37a7..39158ab 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -145,7 +145,7 @@ static void idr_layer_rcu_free(struct rcu_head *head)
 
 static inline void free_layer(struct idr *idr, struct idr_layer *p)
 {
-	if (idr->hint && idr->hint == p)
+	if (idr->hint == p)
 		RCU_INIT_POINTER(idr->hint, NULL);
 	call_rcu(&p->rcu_head, idr_layer_rcu_free);
 }
-- 
1.7.4.4

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