Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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>
19extern void touch_nmi_watchdog(void);
20extern void acpi_nmi_disable(void);
21extern void acpi_nmi_enable(void);
22#else
23#ifndef CONFIG_HARDLOCKUP_DETECTOR
24static inline void touch_nmi_watchdog(void)
25{
26 touch_softlockup_watchdog();
27}
28#else
29extern void touch_nmi_watchdog(void);
30#endif
31static inline void acpi_nmi_disable(void) { }
32static 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
41static inline bool trigger_all_cpu_backtrace(void)
42{
43 arch_trigger_all_cpu_backtrace();
44
45 return true;
46}
47#else
48static inline bool trigger_all_cpu_backtrace(void)
49{
50 return false;
51}
52#endif
53
54#ifdef CONFIG_LOCKUP_DETECTOR
55int hw_nmi_is_cpu_stuck(struct pt_regs *);
56u64 hw_nmi_get_sample_period(void);
57extern int watchdog_enabled;
58struct ctl_table;
59extern int proc_dowatchdog_enabled(struct ctl_table *, int ,
60 void __user *, size_t *, loff_t *);
61#endif
62
63#endif