add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/include/linux/sched/deadline.h
..
..
@@ -24,3 +24,11 @@
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 {
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 	return (s64)(a - b) < 0;
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 }
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+
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+#ifdef CONFIG_SMP
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+
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+struct root_domain;
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+extern void dl_add_task_root_domain(struct task_struct *p);
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+extern void dl_clear_root_domain(struct root_domain *rd);
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+
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+#endif /* CONFIG_SMP */