add at24 driver

hc

2023-11-06 15ade055295d13f95d49e3d99b09f3bbfb4a43e7

 kernel/kernel/rcu/update.c
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@@ -68,8 +68,10 @@
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 module_param(rcu_expedited, int, 0);
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 extern int rcu_normal; /* from sysctl */
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 module_param(rcu_normal, int, 0);
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-static int rcu_normal_after_boot;
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+static int rcu_normal_after_boot = IS_ENABLED(CONFIG_PREEMPT_RT_FULL);
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+#ifndef CONFIG_PREEMPT_RT_FULL
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 module_param(rcu_normal_after_boot, int, 0);
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+#endif
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 #endif /* #ifndef CONFIG_TINY_RCU */
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 #ifdef CONFIG_DEBUG_LOCK_ALLOC
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@@ -288,6 +290,7 @@
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 }
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 EXPORT_SYMBOL_GPL(rcu_read_lock_held);
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+#ifndef CONFIG_PREEMPT_RT_FULL
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 /**
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  * rcu_read_lock_bh_held() - might we be in RCU-bh read-side critical section?
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  *
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@@ -314,6 +317,7 @@
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 	return in_softirq() || irqs_disabled();
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 }
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 EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held);
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+#endif
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 #endif /* #ifdef CONFIG_DEBUG_LOCK_ALLOC */
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