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x86: Convert nmi_lock to raw_spinlock

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nmi_lock must be a spinning spinlock in -rt.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner
2009-07-25 16:49:55 +02:00
parent dade771692
commit 0fdc7a8022
1 changed files with 3 additions and 3 deletions
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6
arch/x86/kernel/apic/nmi.c
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@@ -416,13 +416,13 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
/* We can be called before check_nmi_watchdog, hence NULL check. */ /* We can be called before check_nmi_watchdog, hence NULL check. */
if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) { if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) {
static DEFINE_SPINLOCK(lock); /* Serialise the printks */ static DEFINE_RAW_SPINLOCK(lock); /* Serialise the printks */
spin_lock(&lock); raw_spin_lock(&lock);
printk(KERN_WARNING "NMI backtrace for cpu %d\n", cpu); printk(KERN_WARNING "NMI backtrace for cpu %d\n", cpu);
show_regs(regs); show_regs(regs);
dump_stack(); dump_stack();
spin_unlock(&lock); raw_spin_unlock(&lock);
cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask)); cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));
rc = 1; rc = 1;