add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/net/rds/message.c
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@@ -104,9 +104,9 @@
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 	spin_lock_irqsave(&q->lock, flags);
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 	head = &q->zcookie_head;
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 	if (!list_empty(head)) {
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-		info = list_entry(head, struct rds_msg_zcopy_info,
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-				  rs_zcookie_next);
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-		if (info && rds_zcookie_add(info, cookie)) {
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+		info = list_first_entry(head, struct rds_msg_zcopy_info,
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+					rs_zcookie_next);
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+		if (rds_zcookie_add(info, cookie)) {
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 			spin_unlock_irqrestore(&q->lock, flags);
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 			kfree(rds_info_from_znotifier(znotif));
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 			/* caller invokes rds_wake_sk_sleep() */
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@@ -118,7 +118,7 @@
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 	ck = &info->zcookies;
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 	memset(ck, 0, sizeof(*ck));
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 	WARN_ON(!rds_zcookie_add(info, cookie));
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-	list_add_tail(&q->zcookie_head, &info->rs_zcookie_next);
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+	list_add_tail(&info->rs_zcookie_next, &q->zcookie_head);
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 	spin_unlock_irqrestore(&q->lock, flags);
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 	/* caller invokes rds_wake_sk_sleep() */