[RFC][v2] Kernel Access to Ftrace Instances.

[Divya Indi]

Hi,
Please review the patches that follow -

[PATCH 1/3] tracing: Relevant changes for kernel access to Ftrace instances.
[PATCH 2/3] tracing: Adding additional NULL checks.
[PATCH 3/3] tracing: Add 2 new funcs. for kernel access to Ftrace instances.

This is v2 for the series with changes made to Patch 3/3 to address review comments. 

The new changes ensure that a trace array created by trace_array_create or
accessed via trace_array_lookup cannot be freed if still in use.

Let me know if you have any questions/concerns/suggestions. 

Thanks,
Divya