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 extern void touch_nmi_watchdog(void); 20 extern void acpi_nmi_disable(void); 21 extern void acpi_nmi_enable(void); 22 #else 23 #ifndef CONFIG_HARDLOCKUP_DETECTOR 24 static inline void touch_nmi_watchdog(void) 25 { 26 touch_softlockup_watchdog(); 27 } 28 #else 29 extern void touch_nmi_watchdog(void); 30 #endif 31 static inline void acpi_nmi_disable(void) { } 32 static 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 41 static inline bool trigger_all_cpu_backtrace(void) 42 { 43 arch_trigger_all_cpu_backtrace(); 44 45 return true; 46 } 47 #else 48 static inline bool trigger_all_cpu_backtrace(void) 49 { 50 return false; 51 } 52 #endif 53 54 #ifdef CONFIG_LOCKUP_DETECTOR 55 int hw_nmi_is_cpu_stuck(struct pt_regs *); 56 u64 hw_nmi_get_sample_period(void); 57 extern int watchdog_enabled; 58 struct ctl_table; 59 extern int proc_dowatchdog_enabled(struct ctl_table *, int , 60 void __user *, size_t *, loff_t *); 61 #endif 62 63 #endif 64