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 #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