linux/include/linux/context_tracking.h
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   1#ifndef _LINUX_CONTEXT_TRACKING_H
   2#define _LINUX_CONTEXT_TRACKING_H
   3
   4#ifdef CONFIG_CONTEXT_TRACKING
   5#include <linux/sched.h>
   6
   7extern void user_enter(void);
   8extern void user_exit(void);
   9extern void context_tracking_task_switch(struct task_struct *prev,
  10                                         struct task_struct *next);
  11#else
  12static inline void user_enter(void) { }
  13static inline void user_exit(void) { }
  14static inline void context_tracking_task_switch(struct task_struct *prev,
  15                                                struct task_struct *next) { }
  16#endif /* !CONFIG_CONTEXT_TRACKING */
  17
  18#endif
  19
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