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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/net/core/dst_cache.c
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@@ -1,12 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * net/core/dst_cache.c - dst entry cache
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  *
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  * Copyright (c) 2016 Paolo Abeni <pabeni@redhat.com>
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
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- * the Free Software Foundation; either version 2 of the License, or
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- * (at your option) any later version.
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  */
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 #include <linux/kernel.h>
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@@ -166,3 +162,22 @@
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 	free_percpu(dst_cache->cache);
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 }
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 EXPORT_SYMBOL_GPL(dst_cache_destroy);
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+
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+void dst_cache_reset_now(struct dst_cache *dst_cache)
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+{
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+	int i;
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+
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+	if (!dst_cache->cache)
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+		return;
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+
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+	dst_cache->reset_ts = jiffies;
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+	for_each_possible_cpu(i) {
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+		struct dst_cache_pcpu *idst = per_cpu_ptr(dst_cache->cache, i);
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+		struct dst_entry *dst = idst->dst;
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+
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+		idst->cookie = 0;
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+		idst->dst = NULL;
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+		dst_release(dst);
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+	}
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+}
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+EXPORT_SYMBOL_GPL(dst_cache_reset_now);