Currently NMI uses spinlocks to serialize the prints. We need these to
be raw spinlocks for PREEMPT_RT
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Index: linux-2.6.21-rt9/arch/x86_64/kernel/nmi.c
===================================================================
--- linux-2.6.21-rt9.orig/arch/x86_64/kernel/nmi.c
+++ linux-2.6.21-rt9/arch/x86_64/kernel/nmi.c
@@ -949,7 +949,7 @@ int __kprobes nmi_watchdog_tick(struct p
}
if (cpu_isset(cpu, backtrace_mask)) {
- static DEFINE_SPINLOCK(lock); /* Serialise the printks */
+ static DEFINE_RAW_SPINLOCK(lock); /* Serialise the printks */
spin_lock(&lock);
printk("NMI backtrace for cpu %d\n", cpu);
-
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