#ifndef _LINUX_CONTEXT_TRACKING_H#define _LINUX_CONTEXT_TRACKING_H #include <linux/sched.h>#include <linux/vtime.h>#include <linux/context_tracking_state.h>#include <asm/ptrace.h>  #ifdef CONFIG_CONTEXT_TRACKINGextern void context_tracking_cpu_set(int cpu); extern void context_tracking_user_enter(void);extern void context_tracking_user_exit(void);extern void __context_tracking_task_switch(struct task_struct *prev,					   struct task_struct *next); static inline void user_enter(void){	if (context_tracking_is_enabled())		context_tracking_user_enter(); }static inline void user_exit(void){	if (context_tracking_is_enabled())		context_tracking_user_exit();} static inline enum ctx_state exception_enter(void){	enum ctx_state prev_ctx; 	if (!context_tracking_is_enabled())		return 0; 	prev_ctx = this_cpu_read(context_tracking.state);	context_tracking_user_exit(); 	return prev_ctx;} static inline void exception_exit(enum ctx_state prev_ctx){	if (context_tracking_is_enabled()) {		if (prev_ctx == IN_USER)			context_tracking_user_enter();	}} static inline void context_tracking_task_switch(struct task_struct *prev,						struct task_struct *next){	if (context_tracking_is_enabled())		__context_tracking_task_switch(prev, next);}#elsestatic inline void user_enter(void) { }static inline void user_exit(void) { }static inline enum ctx_state exception_enter(void) { return 0; }static inline void exception_exit(enum ctx_state prev_ctx) { }static inline void context_tracking_task_switch(struct task_struct *prev,						struct task_struct *next) { }#endif /* !CONFIG_CONTEXT_TRACKING */  #ifdef CONFIG_CONTEXT_TRACKING_FORCEextern void context_tracking_init(void);#elsestatic inline void context_tracking_init(void) { }#endif /* CONFIG_CONTEXT_TRACKING_FORCE */  #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GENstatic inline void guest_enter(void){	if (vtime_accounting_enabled())		vtime_guest_enter(current);	else		current->flags |= PF_VCPU;} static inline void guest_exit(void){	if (vtime_accounting_enabled())		vtime_guest_exit(current);	else		current->flags &= ~PF_VCPU;} #elsestatic inline void guest_enter(void){	/*	 * This is running in ioctl context so its safe	 * to assume that it's the stime pending cputime	 * to flush.	 */	vtime_account_system(current);	current->flags |= PF_VCPU;} static inline void guest_exit(void){	/* Flush the guest cputime we spent on the guest */	vtime_account_system(current);	current->flags &= ~PF_VCPU;}#endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */ #endif