[PATCH] tracing: add #include <linux/delay.h> to fix build failurein test_work()

[Ingo Molnar]

* Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:

> From: Steven Rostedt <srostedt@xxxxxxxxxx>
> 
> As events start to become popular, and the new way to add tracing 
> infrastructure into ftrace, it is important to catch any problems 
> that might happen with a mistake in the TRACE_EVENT macro.
> 
> This patch introduces a startup self test on the registered trace 
> events. Note, it can only do a generic test, any type of testing 
> that needs more involement is needed to be implemented by the 
> tracepoint creators.
> 
> The test goes down one by one enabling a trace point and running 
> some random tasks (random in the sense that I just made them up). 
> Those tasks are creating threads, grabbing mutexes and spinlocks 
> and using workqueues.
> 
> After testing each event individually, it does the same test after
> enabling each system of trace points. Like sched, irq, lockdep.
> 
> Then finally it enables all tracepoints and performs the tasks 
> again. The output to the console on bootup will look like this 
> when everything works:
> 
> Running tests on trace events:
> Testing event kfree_skb: OK
> Testing event kmalloc: OK
> Testing event kmem_cache_alloc: OK
> Testing event kmalloc_node: OK
> Testing event kmem_cache_alloc_node: OK
> Testing event kfree: OK
> Testing event kmem_cache_free: OK
> Testing event irq_handler_exit: OK
> Testing event irq_handler_entry: OK
> Testing event softirq_entry: OK
> Testing event softirq_exit: OK
> Testing event lock_acquire: OK
> Testing event lock_release: OK
> Testing event sched_kthread_stop: OK
> Testing event sched_kthread_stop_ret: OK
> Testing event sched_wait_task: OK
> Testing event sched_wakeup: OK
> Testing event sched_wakeup_new: OK
> Testing event sched_switch: OK
> Testing event sched_migrate_task: OK
> Testing event sched_process_free: OK
> Testing event sched_process_exit: OK
> Testing event sched_process_wait: OK
> Testing event sched_process_fork: OK
> Testing event sched_signal_send: OK
> Running tests on trace event systems:
> Testing event system skb: OK
> Testing event system kmem: OK
> Testing event system irq: OK
> Testing event system lockdep: OK
> Testing event system sched: OK
> Running tests on all trace events:
> Testing all events: OK

Thanks Steve, really nice!

FYI, it needed the small build fix below.

	Ingo

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