rk3568 rt init

hc

2023-11-06 e3e12f52b214121840b44c91de5b3e5af5d3eb84

 kernel/kernel/ksysfs.c
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@@ -140,6 +140,15 @@
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 #endif /* CONFIG_CRASH_CORE */
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+#if defined(CONFIG_PREEMPT_RT_FULL)
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+static ssize_t realtime_show(struct kobject *kobj,
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+			     struct kobj_attribute *attr, char *buf)
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+{
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+	return sprintf(buf, "%d\n", 1);
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+}
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+KERNEL_ATTR_RO(realtime);
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+#endif
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+
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 /* whether file capabilities are enabled */
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 static ssize_t fscaps_show(struct kobject *kobj,
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 				  struct kobj_attribute *attr, char *buf)
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@@ -231,6 +240,9 @@
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 	&rcu_expedited_attr.attr,
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 	&rcu_normal_attr.attr,
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 #endif
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+	&realtime_attr.attr,
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+#endif
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 	NULL
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 };
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