rk3568 rt init

hc

2023-11-06 e3e12f52b214121840b44c91de5b3e5af5d3eb84

 kernel/mm/mmu_context.c
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@@ -25,6 +25,7 @@
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 	struct task_struct *tsk = current;
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 	task_lock(tsk);
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+	preempt_disable_rt();
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 	active_mm = tsk->active_mm;
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 	if (active_mm != mm) {
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 		mmgrab(mm);
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@@ -32,6 +33,7 @@
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 	}
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 	tsk->mm = mm;
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 	switch_mm(active_mm, mm, tsk);
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+	preempt_enable_rt();
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 	task_unlock(tsk);
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 #ifdef finish_arch_post_lock_switch
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 	finish_arch_post_lock_switch();