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