error implicit declaration of function idle_task_exit

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2023-08-31 About 100 words One minute

arch/mips/xburst2/core/smp.c:451:2: error: implicit declaration of function 'idle_task_exit'; did you mean 'kcov_task_exit'? [-Werror=implicit-function-declaration]
  idle_task_exit();
  ^~~~~~~~~~~~~~
  kcov_task_exit

#include <linux/sched/hotplug.h>