linux-kernel - [PATCH 1/2] nbd: use list_for_each_entry_safe to make it more consolidated and readable

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Message-Id: <11848376711601-git-send-email-crquan@gmail.com>
Date:	Thu, 19 Jul 2007 17:34:30 +0800
From:	Denis Cheng <crquan@...il.com>
To:	Paul Clements <Paul.Clements@...eleye.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pavel Machek <pavel@....cz>,
	Steven Whitehouse <steve@...gwyn.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Denis Cheng <crquan@...il.com>
Subject: [PATCH 1/2] nbd: use list_for_each_entry_safe to make it more consolidated and readable

Thus the traverse of the loop may delete nodes, use the safe version.

Signed-off-by: Denis Cheng <crquan@...il.com>
---
 drivers/block/nbd.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index c129510..86639c0 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -237,8 +237,7 @@ error_out:
 
 static struct request *nbd_find_request(struct nbd_device *lo, char *handle)
 {
-	struct request *req;
-	struct list_head *tmp;
+	struct request *req, *n;
 	struct request *xreq;
 	int err;
 
@@ -249,8 +248,7 @@ static struct request *nbd_find_request(struct nbd_device *lo, char *handle)
 		goto out;
 
 	spin_lock(&lo->queue_lock);
-	list_for_each(tmp, &lo->queue_head) {
-		req = list_entry(tmp, struct request, queuelist);
+	list_for_each_entry_safe(req, n, &lo->queue_head, queuelist) {
 		if (req != xreq)
 			continue;
 		list_del_init(&req->queuelist);
-- 
1.5.2.2

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