[Crash-utility] [Crash-Utility] extensions/trace: Add support for multiple ftrace buffers

This is my first time submitting a patch to a mailing list, so please be patient with me if I've made any mistakes. Since the 3.10 release, the Linux kernel has offered the ability to create multiple independent ftrace buffers. At present, however, crash is only able to extract the primary buffer. These patches seek to change that. All of the data is already collected in the vmcore file; crash just isn't currently extracting it. I've split this changeset up into two pieces to address this. This first part shouldn't lead to any change in functionality; it simply refactors the trace extension so that the global instance is passed around as a parameter rather than accessing it directly. That facilitates the second part, which locates all of the available instances and extracts the data from each of them. My testing has only included vmcores collected from 32-bit ARM systems, but I don't believe I have made any assumptions about the architecture in my code. Kyle Tomsic (2): Refactor trace extension to pass trace information as an argument Add support for multiple ftrace instances to trace extension extensions/trace.c | 430 +++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 333 insertions(+), 97 deletions(-) -- 2.9.2