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hc
2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f 
 kernel/kernel/time/hrtimer.c
....@@ -2052,36 +2052,6 @@
20522052 }
20532053 #endif
20542054 
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-#ifdef CONFIG_PREEMPT_RT
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-/*
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- * Sleep for 1 ms in hope whoever holds what we want will let it go.
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- */
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-void cpu_chill(void)
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-{
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-	unsigned int freeze_flag = current->flags & PF_NOFREEZE;
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-	struct task_struct *self = current;
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-	ktime_t chill_time;
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-
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-	raw_spin_lock_irq(&self->pi_lock);
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-	self->saved_state = self->state;
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-	__set_current_state_no_track(TASK_UNINTERRUPTIBLE);
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-	raw_spin_unlock_irq(&self->pi_lock);
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-
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-	chill_time = ktime_set(0, NSEC_PER_MSEC);
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-
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-	current->flags |= PF_NOFREEZE;
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-	schedule_hrtimeout(&chill_time, HRTIMER_MODE_REL_HARD);
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-	if (!freeze_flag)
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-		current->flags &= ~PF_NOFREEZE;
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-
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-	raw_spin_lock_irq(&self->pi_lock);
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-	__set_current_state_no_track(self->saved_state);
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-	self->saved_state = TASK_RUNNING;
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-	raw_spin_unlock_irq(&self->pi_lock);
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-}
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-EXPORT_SYMBOL(cpu_chill);
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-#endif
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-
20852055 /*
20862056  * Functions related to boot-time initialization:
20872057  */