#ifndef _LINUX_CONTEXT_TRACKING_STATE_H#define _LINUX_CONTEXT_TRACKING_STATE_H #include <linux/percpu.h>#include <linux/static_key.h> struct context_tracking {	/*	 * When active is false, probes are unset in order	 * to minimize overhead: TIF flags are cleared	 * and calls to user_enter/exit are ignored. This	 * may be further optimized using static keys.	 */	bool active;	int recursion;	enum ctx_state {		CONTEXT_DISABLED = -1,	/* returned by ct_state() if unknown */		CONTEXT_KERNEL = 0,		CONTEXT_USER,		CONTEXT_GUEST,	} state;}; #ifdef CONFIG_CONTEXT_TRACKINGextern struct static_key_false context_tracking_enabled;DECLARE_PER_CPU(struct context_tracking, context_tracking); static inline bool context_tracking_is_enabled(void){	return static_branch_unlikely(&context_tracking_enabled);} static inline bool context_tracking_cpu_is_enabled(void){	return __this_cpu_read(context_tracking.active);} static inline bool context_tracking_in_user(void){	return __this_cpu_read(context_tracking.state) == CONTEXT_USER;}#elsestatic inline bool context_tracking_in_user(void) { return false; }static inline bool context_tracking_active(void) { return false; }static inline bool context_tracking_is_enabled(void) { return false; }static inline bool context_tracking_cpu_is_enabled(void) { return false; }#endif /* CONFIG_CONTEXT_TRACKING */ #endif