Commit 0fdc7a80 authored by Thomas Gleixner's avatar Thomas Gleixner
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x86: Convert nmi_lock to raw_spinlock 



nmi_lock must be a spinning spinlock in -rt.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent dade7716

arch/x86/kernel/apic/nmi.c

+3 −3
Original line number Diff line number Diff line
@@ -416,13 +416,13 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason) 


	/* We can be called before check_nmi_watchdog, hence NULL check. */

	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);

		show_regs(regs);

		dump_stack();

		spin_unlock(&lock);

		raw_spin_unlock(&lock);

		cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));



		rc = 1;