add can driver

hc

2023-12-02 57e32c52610e6a560beda60bf33c48f9f42306d5

 kernel/lib/debugobjects.c
..
..
@@ -376,7 +376,10 @@
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 	struct debug_obj *obj;
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 	unsigned long flags;
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-	fill_pool();
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+	if (preempt_count() == 0 && !irqs_disabled())
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+#endif
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+		fill_pool();
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 	db = get_bucket((unsigned long) addr);
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