add at24 driver

hc

2023-11-06 15ade055295d13f95d49e3d99b09f3bbfb4a43e7

 kernel/include/linux/sched/task.h
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@@ -90,6 +90,15 @@
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 #define get_task_struct(tsk) do { atomic_inc(&(tsk)->usage); } while(0)
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+#ifdef CONFIG_PREEMPT_RT_BASE
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+extern void __put_task_struct_cb(struct rcu_head *rhp);
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+
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+static inline void put_task_struct(struct task_struct *t)
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+{
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+	if (atomic_dec_and_test(&t->usage))
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+		call_rcu(&t->put_rcu, __put_task_struct_cb);
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+}
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+#else
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 extern void __put_task_struct(struct task_struct *t);
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 static inline void put_task_struct(struct task_struct *t)
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@@ -97,7 +106,7 @@
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 	if (atomic_dec_and_test(&t->usage))
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 		__put_task_struct(t);
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 }
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-
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+#endif
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 struct task_struct *task_rcu_dereference(struct task_struct **ptask);
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 #ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT