bb81a09e55
When a spinlock lockup occurs, arrange for the NMI code to emit an all-cpu backtrace, so we get to see which CPU is holding the lock, and where. Cc: Andi Kleen <ak@muc.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de>
29 lines
655 B
C
29 lines
655 B
C
/*
|
|
* linux/include/linux/nmi.h
|
|
*/
|
|
#ifndef LINUX_NMI_H
|
|
#define LINUX_NMI_H
|
|
|
|
#include <linux/sched.h>
|
|
#include <asm/irq.h>
|
|
|
|
/**
|
|
* touch_nmi_watchdog - restart NMI watchdog timeout.
|
|
*
|
|
* If the architecture supports the NMI watchdog, touch_nmi_watchdog()
|
|
* may be used to reset the timeout - for code which intentionally
|
|
* disables interrupts for a long time. This call is stateless.
|
|
*/
|
|
#ifdef ARCH_HAS_NMI_WATCHDOG
|
|
#include <asm/nmi.h>
|
|
extern void touch_nmi_watchdog(void);
|
|
#else
|
|
# define touch_nmi_watchdog() touch_softlockup_watchdog()
|
|
#endif
|
|
|
|
#ifndef trigger_all_cpu_backtrace
|
|
#define trigger_all_cpu_backtrace() do { } while (0)
|
|
#endif
|
|
|
|
#endif
|