linux/include/linux/nmi.h
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   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>
  19extern void touch_nmi_watchdog(void);
  20#else
  21static 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
  33static inline bool trigger_all_cpu_backtrace(void)
  34{
  35        arch_trigger_all_cpu_backtrace();
  36
  37        return true;
  38}
  39#else
  40static inline bool trigger_all_cpu_backtrace(void)
  41{
  42        return false;
  43}
  44#endif
  45
  46#ifdef CONFIG_LOCKUP_DETECTOR
  47int hw_nmi_is_cpu_stuck(struct pt_regs *);
  48u64 hw_nmi_get_sample_period(int watchdog_thresh);
  49extern int watchdog_enabled;
  50extern int watchdog_thresh;
  51struct ctl_table;
  52extern int proc_dowatchdog(struct ctl_table *, int ,
  53                           void __user *, size_t *, loff_t *);
  54#endif
  55
  56#endif
  57
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