linux-kernel - [PATCH 02/11] block: Remove useless IPI struct initialization

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Message-Id: <1393256402-16907-3-git-send-email-fweisbec@gmail.com>
Date:	Mon, 24 Feb 2014 16:39:53 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, Jan Kara <jack@...e.cz>,
	Jens Axboe <axboe@...com>
Subject: [PATCH 02/11] block: Remove useless IPI struct initialization

rq_fifo_clear() reset the csd.list through INIT_LIST_HEAD for no clear
purpose. The csd.list doesn't need to be initialized as a list head
because it's only ever used as a list node.

Lets remove this useless initialization.

Reviewed-by: Jan Kara <jack@...e.cz>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Christoph Hellwig <hch@...radead.org>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jan Kara <jack@...e.cz>
Cc: Jens Axboe <axboe@...com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
---
 include/linux/elevator.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 0bdfd46..df63bd3 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -203,10 +203,7 @@ enum {
 #define rb_entry_rq(node)	rb_entry((node), struct request, rb_node)
 
 #define rq_entry_fifo(ptr)	list_entry((ptr), struct request, queuelist)
-#define rq_fifo_clear(rq)	do {		\
-	list_del_init(&(rq)->queuelist);	\
-	INIT_LIST_HEAD(&(rq)->csd.list);	\
-	} while (0)
+#define rq_fifo_clear(rq)	list_del_init(&(rq)->queuelist)
 
 #else /* CONFIG_BLOCK */
 
-- 
1.8.3.1

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