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

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Denis Cheng wrote:
Thus the traverse of the loop may delete nodes, use the safe version.

Signed-off-by: Denis Cheng <[email protected]>
---
 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);

Could you name "n" as "tmp" (as in the previous code) so that it's clear that's only a temporary variable. Other than that, this looks good.

Thanks,
Paul
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