disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/include/linux/rpmsg.h
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@@ -145,6 +145,8 @@
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 int rpmsg_get_signals(struct rpmsg_endpoint *ept);
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 int rpmsg_set_signals(struct rpmsg_endpoint *ept, u32 set, u32 clear);
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+ssize_t rpmsg_get_mtu(struct rpmsg_endpoint *ept);
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+
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 #else
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 static inline int register_rpmsg_device(struct rpmsg_device *dev)
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@@ -269,6 +271,14 @@
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 	return -ENXIO;
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 }
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+static inline ssize_t rpmsg_get_mtu(struct rpmsg_endpoint *ept)
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+{
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+	/* This shouldn't be possible */
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+	WARN_ON(1);
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+
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+	return -ENXIO;
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+}
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+
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 #endif /* IS_ENABLED(CONFIG_RPMSG) */
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 /* use a macro to avoid include chaining to get THIS_MODULE */