[deliverable/linux.git] / include / linux / nmi.h

/*
 *  linux/include/linux/nmi.h
 */
#ifndef LINUX_NMI_H
#define LINUX_NMI_H

#include <linux/sched.h>
#include <asm/irq.h>

/**
 * touch_nmi_watchdog - restart NMI watchdog timeout.
 * 
 * If the architecture supports the NMI watchdog, touch_nmi_watchdog()
 * may be used to reset the timeout - for code which intentionally
 * disables interrupts for a long time. This call is stateless.
 */
#if defined(CONFIG_HAVE_NMI_WATCHDOG) || defined(CONFIG_HARDLOCKUP_DETECTOR)
#include <asm/nmi.h>
extern void touch_nmi_watchdog(void);
#else
static inline void touch_nmi_watchdog(void)
{
	touch_softlockup_watchdog();
}
#endif

/*
 * Create trigger_all_cpu_backtrace() out of the arch-provided
 * base function. Return whether such support was available,
 * to allow calling code to fall back to some other mechanism:
 */
#ifdef arch_trigger_all_cpu_backtrace
static inline bool trigger_all_cpu_backtrace(void)
{
	arch_trigger_all_cpu_backtrace();

	return true;
}
#else
static inline bool trigger_all_cpu_backtrace(void)
{
	return false;
}
#endif

#ifdef CONFIG_LOCKUP_DETECTOR
int hw_nmi_is_cpu_stuck(struct pt_regs *);
u64 hw_nmi_get_sample_period(int watchdog_thresh);
extern int watchdog_enabled;
extern int watchdog_thresh;
struct ctl_table;
extern int proc_dowatchdog(struct ctl_table *, int ,
			   void __user *, size_t *, loff_t *);
#endif

#endif
Commit	Line	Data
	1	/*
	2	* linux/include/linux/nmi.h
	3	*/
	4	#ifndef LINUX_NMI_H
	5	#define LINUX_NMI_H
	6
	7	#include <linux/sched.h>
	8	#include <asm/irq.h>
	9
	10	/**
	11	* touch_nmi_watchdog - restart NMI watchdog timeout.
	12	*
	13	* If the architecture supports the NMI watchdog, touch_nmi_watchdog()
	14	* may be used to reset the timeout - for code which intentionally
	15	* disables interrupts for a long time. This call is stateless.
	16	*/
	17	#if defined(CONFIG_HAVE_NMI_WATCHDOG) \|\| defined(CONFIG_HARDLOCKUP_DETECTOR)
	18	#include <asm/nmi.h>
	19	extern void touch_nmi_watchdog(void);
	20	#else
	21	static inline void touch_nmi_watchdog(void)
	22	{
	23	touch_softlockup_watchdog();
	24	}
	25	#endif
	26
	27	/*
	28	* Create trigger_all_cpu_backtrace() out of the arch-provided
	29	* base function. Return whether such support was available,
	30	* to allow calling code to fall back to some other mechanism:
	31	*/
	32	#ifdef arch_trigger_all_cpu_backtrace
	33	static inline bool trigger_all_cpu_backtrace(void)
	34	{
	35	arch_trigger_all_cpu_backtrace();
	36
	37	return true;
	38	}
	39	#else
	40	static inline bool trigger_all_cpu_backtrace(void)
	41	{
	42	return false;
	43	}
	44	#endif
	45
	46	#ifdef CONFIG_LOCKUP_DETECTOR
	47	int hw_nmi_is_cpu_stuck(struct pt_regs *);
	48	u64 hw_nmi_get_sample_period(int watchdog_thresh);
	49	extern int watchdog_enabled;
	50	extern int watchdog_thresh;
	51	struct ctl_table;
	52	extern int proc_dowatchdog(struct ctl_table *, int ,
	53	void __user , size_t , loff_t *);
	54	#endif
	55
	56	#endif