Re: [PATCH] wifi: cfg80211: avoid holding rtnl_mutex across all cfg80211_leave() calls

On Sun, 2026-09-06 at 03:25 +0300, Ömer Mete Kaya wrote:

+	/*
+	 * Snapshot rdev pointers under RCU with a device reference so they
+	 * cannot be freed between per-device rtnl acquisitions. Using a
+	 * per-device rtnl_lock() instead of holding it across all devices
+	 * avoids starving other rtnl waiters when cfg80211_leave() is slow.
+	 */
+	rcu_read_lock();
+	list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
+		n++;
+	rcu_read_unlock();
 
-	rtnl_unlock();
+	if (!n)
+		return;
+
+	snap = kmalloc_array(n, sizeof(*snap), GFP_KERNEL);
+	if (!snap)
+		return;

I really don't know _what_ you're doing here, or more realistically what
exactly you're asking your LLM to do here, but it's pointless. Please
just stop, you're not helping in any way.

johannes