LXR linux/include/linux/nmi.h

   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#ifdef ARCH_HAS_NMI_WATCHDOG
  18#include <asm/nmi.h>
  19extern void touch_nmi_watchdog(void);
  20extern void acpi_nmi_disable(void);
  21extern void acpi_nmi_enable(void);
  22#else
  23#ifndef CONFIG_HARDLOCKUP_DETECTOR
  24static inline void touch_nmi_watchdog(void)
  25{
  26        touch_softlockup_watchdog();
  27}
  28#else
  29extern void touch_nmi_watchdog(void);
  30#endif
  31static inline void acpi_nmi_disable(void) { }
  32static inline void acpi_nmi_enable(void) { }
  33#endif
  34
  35/*
  36 * Create trigger_all_cpu_backtrace() out of the arch-provided
  37 * base function. Return whether such support was available,
  38 * to allow calling code to fall back to some other mechanism:
  39 */
  40#ifdef arch_trigger_all_cpu_backtrace
  41static inline bool trigger_all_cpu_backtrace(void)
  42{
  43        arch_trigger_all_cpu_backtrace();
  44
  45        return true;
  46}
  47#else
  48static inline bool trigger_all_cpu_backtrace(void)
  49{
  50        return false;
  51}
  52#endif
  53
  54#ifdef CONFIG_LOCKUP_DETECTOR
  55int hw_nmi_is_cpu_stuck(struct pt_regs *);
  56u64 hw_nmi_get_sample_period(void);
  57extern int watchdog_enabled;
  58struct ctl_table;
  59extern int proc_dowatchdog_enabled(struct ctl_table *, int ,
  60                        void __user *, size_t *, loff_t *);
  61#endif
  62
  63#endif
  64