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#ifndef _LINUX_KERNEL_VTIME_H
#define _LINUX_KERNEL_VTIME_H
struct task_struct;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
extern void vtime_task_switch(struct task_struct *prev);
extern void vtime_account_system(struct task_struct *tsk);
extern void vtime_account_idle(struct task_struct *tsk);
extern void vtime_account_user(struct task_struct *tsk);
extern void vtime_account(struct task_struct *tsk);
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
extern bool vtime_accounting_enabled(void);
#else
static inline bool vtime_accounting_enabled(void) { return true; }
#endif
#else /* !CONFIG_VIRT_CPU_ACCOUNTING */
static inline void vtime_task_switch(struct task_struct *prev) { }
static inline void vtime_account_system(struct task_struct *tsk) { }
static inline void vtime_account_user(struct task_struct *tsk) { }
static inline void vtime_account(struct task_struct *tsk) { }
static inline bool vtime_accounting_enabled(void) { return false; }
#endif
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
static inline void vtime_user_enter(struct task_struct *tsk)
{
vtime_account_system(tsk);
}
static inline void vtime_user_exit(struct task_struct *tsk)
{
vtime_account_user(tsk);
}
#else
static inline void vtime_user_enter(struct task_struct *tsk) { }
static inline void vtime_user_exit(struct task_struct *tsk) { }
#endif
#ifdef CONFIG_IRQ_TIME_ACCOUNTING
extern void irqtime_account_irq(struct task_struct *tsk);
#else
static inline void irqtime_account_irq(struct task_struct *tsk) { }
#endif
static inline void vtime_account_irq_enter(struct task_struct *tsk)
{
/*
* Hardirq can interrupt idle task anytime. So we need vtime_account()
* that performs the idle check in CONFIG_VIRT_CPU_ACCOUNTING.
* Softirq can also interrupt idle task directly if it calls
* local_bh_enable(). Such case probably don't exist but we never know.
* Ksoftirqd is not concerned because idle time is flushed on context
* switch. Softirqs in the end of hardirqs are also not a problem because
* the idle time is flushed on hardirq time already.
*/
vtime_account(tsk);
irqtime_account_irq(tsk);
}
static inline void vtime_account_irq_exit(struct task_struct *tsk)
{
/* On hard|softirq exit we always account to hard|softirq cputime */
vtime_account_system(tsk);
irqtime_account_irq(tsk);
}
#endif /* _LINUX_KERNEL_VTIME_H */
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