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