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author | Don Zickus <dzickus@redhat.com> | 2010-05-07 17:11:49 -0400 |
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committer | Frederic Weisbecker <fweisbec@gmail.com> | 2010-05-12 23:55:48 +0200 |
commit | 10f9014912a2b1cb59c39cdea777e6d9afa8f17e (patch) | |
tree | aabff4eb9f190260682f047938178f766383a461 /arch/x86/kernel/apic/hw_nmi.c | |
parent | 7cbb7e7fa46f6e5229438ac9e4a5c72ec0d53e0b (diff) | |
download | linux-10f9014912a2b1cb59c39cdea777e6d9afa8f17e.tar.bz2 |
x86: Cleanup hw_nmi.c cruft
The design of the hardlockup watchdog has changed and cruft was left
behind in the hw_nmi.c file. Just remove the code that isn't used
anymore.
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Eric Paris <eparis@redhat.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
LKML-Reference: <1273266711-18706-7-git-send-email-dzickus@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/x86/kernel/apic/hw_nmi.c')
-rw-r--r-- | arch/x86/kernel/apic/hw_nmi.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c index 8c3edfb89c2b..3b40082f0371 100644 --- a/arch/x86/kernel/apic/hw_nmi.c +++ b/arch/x86/kernel/apic/hw_nmi.c @@ -9,74 +9,16 @@ * */ -#include <asm/apic.h> -#include <linux/smp.h> #include <linux/cpumask.h> -#include <linux/sched.h> -#include <linux/percpu.h> -#include <linux/cpumask.h> -#include <linux/kernel_stat.h> -#include <asm/mce.h> #include <linux/kdebug.h> #include <linux/notifier.h> #include <linux/kprobes.h> - - #include <linux/nmi.h> #include <linux/module.h> /* For reliability, we're prepared to waste bits here. */ static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly; -static DEFINE_PER_CPU(unsigned, last_irq_sum); - -/* - * Take the local apic timer and PIT/HPET into account. We don't - * know which one is active, when we have highres/dyntick on - */ -static inline unsigned int get_timer_irqs(int cpu) -{ - unsigned int irqs = per_cpu(irq_stat, cpu).irq0_irqs; - -#if defined(CONFIG_X86_LOCAL_APIC) - irqs += per_cpu(irq_stat, cpu).apic_timer_irqs; -#endif - - return irqs; -} - -static inline int mce_in_progress(void) -{ -#if defined(CONFIG_X86_MCE) - return atomic_read(&mce_entry) > 0; -#endif - return 0; -} - -int hw_nmi_is_cpu_stuck(struct pt_regs *regs) -{ - unsigned int sum; - int cpu = smp_processor_id(); - - /* if we are doing an mce, just assume the cpu is not stuck */ - /* Could check oops_in_progress here too, but it's safer not to */ - if (mce_in_progress()) - return 0; - - /* We determine if the cpu is stuck by checking whether any - * interrupts have happened since we last checked. Of course - * an nmi storm could create false positives, but the higher - * level logic should account for that - */ - sum = get_timer_irqs(cpu); - if (__get_cpu_var(last_irq_sum) == sum) { - return 1; - } else { - __get_cpu_var(last_irq_sum) = sum; - return 0; - } -} - u64 hw_nmi_get_sample_period(void) { return (u64)(cpu_khz) * 1000 * 60; |