tree 27b9b64c33b970e0d2608324bc615382953fb705
parent f43fdad8627fec2d21df92799b254dceb66c9c3c
author Steven Rostedt <srostedt@redhat.com> 1210620044 +0200
committer Thomas Gleixner <tglx@linutronix.de> 1211567957 +0200

ftrace: debug smp_processor_id, use notrace preempt disable

The debug smp_processor_id caused a recursive fault in debugging
the irqsoff tracer. The tracer used a smp_processor_id in the
ftrace callback, and this function called preempt_disable which
also is traced. This caused a recursive fault (stack overload).

Since using smp_processor_id without debugging on does not cause
faults with the tracer (even when the tracer is wrong), the
debug version should not cause a system reboot.

This changes the debug_smp_processor_id to use the notrace versions
of preempt_disable and enable.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>