disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/tracepoint.h
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@@ -234,12 +234,11 @@
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  * not add unwanted padding between the beginning of the section and the
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  * structure. Force alignment to the same alignment as the section start.
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  *
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- * When lockdep is enabled, we make sure to always do the RCU portions of
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- * the tracepoint code, regardless of whether tracing is on. However,
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- * don't check if the condition is false, due to interaction with idle
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- * instrumentation. This lets us find RCU issues triggered with tracepoints
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- * even when this tracepoint is off. This code has no purpose other than
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- * poking RCU a bit.
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+ * When lockdep is enabled, we make sure to always test if RCU is
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+ * "watching" regardless if the tracepoint is enabled or not. Tracepoints
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+ * require RCU to be active, and it should always warn at the tracepoint
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+ * site if it is not watching, as it will need to be active when the
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+ * tracepoint is enabled.
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  */
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 #define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args) \
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 	extern int __traceiter_##name(data_proto);			\
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@@ -253,9 +252,7 @@
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 				TP_ARGS(data_args),			\
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 				TP_CONDITION(cond), 0);			\
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 		if (IS_ENABLED(CONFIG_LOCKDEP) && (cond)) {		\
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-			rcu_read_lock_sched_notrace();			\
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-			rcu_dereference_sched(__tracepoint_##name.funcs);\
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-			rcu_read_unlock_sched_notrace();		\
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+			WARN_ON_ONCE(!rcu_is_watching());		\
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 		}							\
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 	}								\
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 	__DECLARE_TRACE_RCU(name, PARAMS(proto), PARAMS(args),		\