linux-kernel - [RESEND PATCH] llist: Make llist_del

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Date: Sun, 18 Feb 2024 14:57:50 +0800
From: liqiang <liqiang64@...wei.com>
To: <akpm@...ux-foundation.org>, <ying.huang@...el.com>,
	<paulmck@...ux.vnet.ibm.com>, <neilb@...e.de>, <chuck.lever@...cle.com>
CC: <linux-kernel@...r.kernel.org>
Subject: [RESEND PATCH] llist: Make llist_del_first return only the first node

Set the next of the returned node of llist_del_first
to NULL, which can prevent subsequent nodes in llist
from being exposed, and is more consistent with the
logic of this interface.

Signed-off-by: liqiang <liqiang64@...wei.com>
---
 lib/llist.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/llist.c b/lib/llist.c
index f21d0cf..c33fff5 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -61,6 +61,7 @@ struct llist_node *llist_del_first(struct llist_head *head)
 		next = READ_ONCE(entry->next);
 	} while (!try_cmpxchg(&head->first, &entry, next));
 
+	entry->next = NULL;
 	return entry;
 }
 EXPORT_SYMBOL_GPL(llist_del_first);
-- 
2.23.0.windows.1