enable tun/tap/iptables

hc

2024-05-10 ee930fffee469d076998274a2ca55e13dc1efb67

 kernel/arch/arm64/include/asm/preempt.h
..
..
@@ -70,43 +70,17 @@
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 	 * interrupt occurring between the non-atomic READ_ONCE/WRITE_ONCE
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 	 * pair.
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 	 */
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-	if (!pc || !READ_ONCE(ti->preempt_count))
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-		return true;
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-#ifdef CONFIG_PREEMPT_LAZY
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-	if ((pc & ~PREEMPT_NEED_RESCHED))
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-		return false;
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-	if (current_thread_info()->preempt_lazy_count)
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-		return false;
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-	return test_thread_flag(TIF_NEED_RESCHED_LAZY);
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-#else
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-	return false;
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-#endif
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+	return !pc || !READ_ONCE(ti->preempt_count);
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 }
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 static inline bool should_resched(int preempt_offset)
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 {
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-#ifdef CONFIG_PREEMPT_LAZY
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-	u64 pc = READ_ONCE(current_thread_info()->preempt_count);
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-	if (pc == preempt_offset)
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-		return true;
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-
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-	if ((pc & ~PREEMPT_NEED_RESCHED) != preempt_offset)
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-		return false;
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-
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-	if (current_thread_info()->preempt_lazy_count)
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-		return false;
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-	return test_thread_flag(TIF_NEED_RESCHED_LAZY);
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-#else
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 	u64 pc = READ_ONCE(current_thread_info()->preempt_count);
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 	return pc == preempt_offset;
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-#endif
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 }
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 #ifdef CONFIG_PREEMPTION
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 void preempt_schedule(void);
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-#ifdef CONFIG_PREEMPT_RT
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-void preempt_schedule_lock(void);
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-#endif
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 #define __preempt_schedule() preempt_schedule()
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 void preempt_schedule_notrace(void);
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 #define __preempt_schedule_notrace() preempt_schedule_notrace()