Revision 95ef1e52922cf75b1ea2eae54ef886f2cc47eecb authored by Avi Kivity on 15 November 2011, 12:59:07 UTC, committed by Avi Kivity on 20 November 2011, 08:53:48 UTC
Prevent tracing of preempt_disable() in get_cpu_var() in kvm_clock_read(). When CONFIG_DEBUG_PREEMPT is enabled, preempt_disable/enable() are traced and this causes the function_graph tracer to go into an infinite recursion. By open coding the preempt_disable() around the get_cpu_var(), we can use the notrace version which prevents preempt_disable/enable() from being traced and prevents the recursion. Based on a similar patch for Xen from Jeremy Fitzhardinge. Tested-by: Gleb Natapov <gleb@redhat.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Avi Kivity <avi@redhat.com>
1 parent bb75c62
hed.h
/*
* hed.h - ACPI Hardware Error Device
*
* Copyright (C) 2009, Intel Corp.
* Author: Huang Ying <ying.huang@intel.com>
*
* This file is released under the GPLv2.
*/
#ifndef ACPI_HED_H
#define ACPI_HED_H
#include <linux/notifier.h>
int register_acpi_hed_notifier(struct notifier_block *nb);
void unregister_acpi_hed_notifier(struct notifier_block *nb);
#endif
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