linux-kernel - [PATCH 3/4] cfq-iosched: remove unused 'group_changed' in cfq_service_tree

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Date:	Tue, 24 May 2011 12:18:50 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	linux-kernel@...r.kernel.org, Justin TerAvest <teravest@...gle.com>
Subject: [PATCH 3/4] cfq-iosched: remove unused 'group_changed' in cfq_service_tree_add()

The 'group_changed' variable is initialized to 0 and never changed, so
checking the variable is meaningless.

It is a leftover from 0bbfeb832042 ("cfq-iosched: Always provide group
iosolation."). Let's get rid of it.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
Cc: Justin TerAvest <teravest@...gle.com>
---
 block/cfq-iosched.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index a79e62063144..4ceebd346710 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1206,7 +1206,6 @@ static void cfq_service_tree_add(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 	struct cfq_rb_root *service_tree;
 	int left;
 	int new_cfqq = 1;
-	int group_changed = 0;
 
 	service_tree = service_tree_for(cfqq->cfqg, cfqq_prio(cfqq),
 						cfqq_type(cfqq));
@@ -1277,7 +1276,7 @@ static void cfq_service_tree_add(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 	rb_link_node(&cfqq->rb_node, parent, p);
 	rb_insert_color(&cfqq->rb_node, &service_tree->rb);
 	service_tree->count++;
-	if ((add_front || !new_cfqq) && !group_changed)
+	if (add_front || !new_cfqq)
 		return;
 	cfq_group_notify_queue_add(cfqd, cfqq->cfqg);
 }
-- 
1.7.5.2

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