[PATCH RT] Use raw spinlocks in NMI print sequencing.
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2007-06-19 20:12:23
Also in:
lkml
Currently NMI uses spinlocks to serialize the prints. We need these to be raw spinlocks for PREEMPT_RT Signed-off-by: Steven Rostedt <rostedt@goodmis.org> 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);