#ifndef LINUX_HARDIRQ_H
#define LINUX_HARDIRQ_H

#include <linux/preempt_mask.h>
#include <linux/lockdep.h>
#include <linux/ftrace_irq.h>
#include <linux/vtime.h>


extern void synchronize_irq(unsigned int irq);

#if defined(CONFIG_TINY_RCU)

static inline void rcu_nmi_enter(void)
{
}

static inline void rcu_nmi_exit(void)
{
}

#else
extern void rcu_nmi_enter(void);
extern void rcu_nmi_exit(void);
#endif

/*
* It is safe to do non-atomic ops on ->hardirq_context,
* because NMI handlers may not preempt and the ops are
* always balanced, so the interrupted value of ->hardirq_context
* will always be restored.
*/
#define __irq_enter() \
do { \
account_irq_enter_time(current); \
preempt_count_add(HARDIRQ_OFFSET); \
trace_hardirq_enter(); \
} while (0)

/*
* Enter irq context (on NO_HZ, update jiffies):
*/
extern void irq_enter(void);

/*
* Exit irq context without processing softirqs:
*/
#define __irq_exit() \
do { \
trace_hardirq_exit(); \
account_irq_exit_time(current); \
preempt_count_sub(HARDIRQ_OFFSET); \
} while (0)

/*
* Exit irq context and process softirqs if needed:
*/
extern void irq_exit(void);

#define nmi_enter() \
do { \
lockdep_off(); \
ftrace_nmi_enter(); \
BUG_ON(in_nmi()); \
preempt_count_add(NMI_OFFSET + HARDIRQ_OFFSET); \
rcu_nmi_enter(); \
trace_hardirq_enter(); \
} while (0)

#define nmi_exit() \
do { \
trace_hardirq_exit(); \
rcu_nmi_exit(); \
BUG_ON(!in_nmi()); \
preempt_count_sub(NMI_OFFSET + HARDIRQ_OFFSET); \
ftrace_nmi_exit(); \
lockdep_on(); \
} while (0)

#endif /* LINUX_HARDIRQ_H */