Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux...
[sfrench/cifs-2.6.git] / 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 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